7Baggers

Transocean Ltd
(NYSE:RIG) 

RIG stock logo

Transocean Ltd., together with its subsidiaries, provides offshore contract drilling services for oil and gas wells worldwide. It contracts its drilling rigs, related equipment, and work crews to drill oil and gas wells. As of February 22, 2021, the company owned or had partial ownership interests i...

Founded: 1953
Full Time Employees: 5,900
Sector: Energy
Industry: Oil & Gas Drilling
Energy
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Quarterly
Annual
    Unit: USD2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 
                                                                        
      contract drilling revenues
    		1,043,000,000 1,028,000,000 988,000,000 906,000,000 952,000,000 948,000,000 861,000,000 763,000,000 741,000,000 713,000,000 729,000,000 649,000,000 606,000,000 691,000,000 692,000,000 586,000,000 621,000,000 626,000,000 656,000,000 653,000,000 690,000,000 773,000,000 930,000,000 759,000,000 792,000,000 784,000,000 758,000,000 754,000,000 748,000,000 816,000,000 790,000,000 664,000,000 589,000,000 699,000,000 705,000,000 738,000,000 793,000,000 883,000,000 918,000,000 1,111,000,000 1,456,000,000 1,569,000,000 1,777,000,000 2,000,000,000 2,167,000,000 2,215,000,000 2,278,000,000 2,292,000,000 2,202,000,000 2,402,000,000 2,321,000,000 2,145,000,000 2,310,000,000 2,390,000,000 2,203,000,000 2,238,000,000 2,061,000,000 2,086,000,000 1,950,000,000 2,032,000,000 2,204,000,000 2,290,000,000 2,441,000,000 2,546,000,000 2,602,000,000 2,625,000,000 2,834,000,000  
      costs and expenses
    		                                                                    
      operating and maintenance
    		605,000,000 584,000,000 599,000,000 618,000,000 579,000,000 563,000,000 534,000,000 523,000,000 569,000,000 524,000,000 484,000,000 409,000,000 423,000,000 411,000,000 433,000,000 412,000,000 430,000,000 398,000,000 434,000,000 435,000,000 465,000,000 470,000,000 525,000,000 540,000,000 575,000,000 547,000,000 510,000,000 508,000,000 497,000,000 447,000,000 431,000,000 424,000,000 389,000,000 323,000,000 333,000,000 343,000,000 306,000,000 404,000,000 500,000,000 665,000,000 794,000,000 880,000,000 197,000,000 1,084,000,000 1,310,000,000 1,318,000,000 1,213,000,000 1,269,000,000 1,532,000,000 1,491,000,000 1,393,000,000 1,375,000,000 1,338,000,000 2,357,000,000 1,410,000,000 2,565,000,000 1,540,000,000 1,492,000,000 1,359,000,000 1,352,000,000 1,213,000,000 1,358,000,000 1,196,000,000 1,296,000,000 1,396,000,000 1,277,000,000 1,171,000,000  
      depreciation and amortization
    		147,000,000 161,000,000 175,000,000 176,000,000 180,000,000 190,000,000 184,000,000 185,000,000 184,000,000 192,000,000 186,000,000 182,000,000 186,000,000 182,000,000 184,000,000 183,000,000 184,000,000 185,000,000 186,000,000 187,000,000 189,000,000 190,000,000 196,000,000 206,000,000 207,000,000 212,000,000 219,000,000 217,000,000                         280,000,000 345,000,000 351,000,000 374,000,000 362,000,000 359,000,000 354,000,000          
      general and administrative
    		50,000,000 46,000,000 49,000,000 50,000,000 56,000,000 47,000,000 59,000,000 52,000,000 50,000,000 44,000,000 48,000,000 45,000,000 55,000,000 42,000,000 43,000,000 42,000,000 49,000,000 40,000,000 39,000,000 39,000,000 50,000,000 45,000,000 45,000,000 43,000,000 54,000,000 45,000,000 45,000,000 49,000,000 54,000,000 35,000,000 52,000,000 47,000,000 43,000,000 39,000,000 35,000,000 39,000,000 48,000,000 39,000,000 42,000,000 43,000,000 58,000,000 45,000,000 44,000,000 46,000,000 62,000,000 52,000,000 63,000,000 57,000,000 75,000,000 67,000,000 77,000,000 67,000,000 69,000,000 79,000,000 69,000,000 88,000,000 67,000,000 66,000,000 67,000,000 67,000,000 59,000,000 58,000,000 63,000,000 46,000,000 54,000,000 53,000,000 56,000,000  
      costs and expenses - sum
    		802,000,000 791,000,000 823,000,000 844,000,000 815,000,000 800,000,000 777,000,000 760,000,000 803,000,000 760,000,000 718,000,000 636,000,000 664,000,000 635,000,000 660,000,000 637,000,000 663,000,000 623,000,000 659,000,000 661,000,000 704,000,000 705,000,000 766,000,000 789,000,000 836,000,000 804,000,000 774,000,000              761,500,000 1,135,000,000 490,000,000 1,421,000,000 1,205,250,000 1,658,000,000 1,564,000,000 1,599,000,000 1,326,000,000 1,831,000,000 1,756,000,000 1,717,000,000      1,917,000,000 1,780,000,000 1,813,000,000 1,666,000,000  1,660,000,000 1,724,000,000 1,817,000,000 1,690,000,000 1,582,000,000  
      loss on impairment of assets
    		 -1,913,000,000 -1,136,000,000   -629,000,000 -143,000,000  1,000,000 -5,000,000 -53,000,000                                                          
      gain on disposal of assets
    		-1,000,000 -1,000,000 7,000,000 2,000,000        -170,000,000   -4,000,000 1,000,000   1,000,000    1,000,000 -1,000,000   -10,000,000 7,000,000   1,000,000 5,000,000 -1,000,000   2,000,000  1,000,000  1,000,000   2,000,000  -12,000,000 -12,000,000 1,000,000  -16,000,000 32,000,000   50,000,000 55,000,000 -4,000,000 -1,000,000 -2,000,000 -1,000,000 8,000,000 1,000,000 2,000,000 268,000,000       
      operating income
    		240,000,000 -1,677,000,000 -964,000,000 64,000,000 130,000,000 -485,000,000 -59,000,000 -3,000,000 -71,000,000 -55,000,000 -42,000,000 -157,000,000 -62,000,000 53,000,000 28,000,000 -50,000,000 -43,000,000  -2,000,000 -67,000,000 -34,000,000 4,000,000 -264,000,000 -199,000,000 -74,000,000 -607,000,000 -27,000,000 -13,000,000 -25,000,000 -305,000,000 -917,000,000  12,000,000 -1,145,000,000 -1,544,000,000 173,000,000 339,000,000 225,000,000 154,000,000 414,000,000 750,000,000 445,000,000 506,000,000 -321,000,000 -647,000,000 -2,168,000,000 765,000,000 672,000,000 407,000,000 742,000,000 602,000,000 473,000,000 803,000,000 -163,000,000 270,000,000 -5,807,000,000 268,000,000 391,000,000 372,000,000 -662,000,000 645,000,000 957,000,000 926,000,000 1,003,000,000 957,000,000 1,121,000,000 1,319,000,000  
      yoy
    		84.62% 245.77% 1533.90% -2233.33% -283.10% 781.82% 40.48% -98.09% 14.52% -203.77% -250.00% 214.00% 44.19% NaN% -1500.00% -25.37% 26.47% NaN% -99.24% -66.33% -54.05% -100.66% 877.78% 1430.77% 196.00% 99.02% -97.06%  -308.33% -73.36% -40.61%  -96.46% -608.89% -1102.60% -58.21% -54.80% -49.44% -69.57% -228.97% -215.92% -120.53% -33.86% -147.77% -258.97% -392.18% 27.08% 42.07% -49.32% -555.21% 122.96% -108.15% 199.63% -141.69% -27.42% 777.19% -58.45% -59.14% -59.83% -166.00% -32.60% -14.63% -29.80%      
      qoq
    		-114.31% 73.96% -1606.25% -50.77% -126.80% 722.03% 1866.67% -95.77% 29.09% 30.95% -73.25% 153.23% -216.98% 89.29% -156.00% 16.28% NaN% NaN% -97.01% 97.06% -950.00% -101.52% 32.66% 168.92% -87.81% 2148.15% 107.69% -48.00% -91.80% -66.74%   -101.05% -25.84% -992.49% -48.97% 50.67% 46.10% -62.80% -44.80% 68.54% -12.06% -257.63% -50.39% -70.16% -383.40% 13.84% 65.11% -45.15% 23.26% 27.27% -41.10% -592.64% -160.37% -104.65% -2266.79% -31.46% 5.11% -156.19% -202.64% -32.60% 3.35% -7.68% 4.81% -14.63% -15.01%   
      other income
    		                                                                    
      interest income
    		10,000,000 12,000,000 10,000,000 8,000,000 10,000,000 11,000,000 14,000,000 15,000,000 10,000,000 12,000,000 11,000,000 19,000,000 12,000,000 9,000,000 4,000,000 2,000,000 4,000,000 4,000,000 4,000,000 3,000,000 2,000,000 6,000,000 4,000,000 9,000,000 10,000,000 11,000,000 12,000,000 10,000,000 17,000,000 11,000,000 13,000,000 12,000,000 9,000,000 21,000,000 7,000,000 6,000,000 5,000,000 5,000,000 4,000,000 6,000,000 5,000,000 5,000,000 6,000,000 6,000,000 8,000,000 6,000,000 15,000,000 10,000,000 13,000,000 11,000,000 11,000,000 17,000,000 15,000,000 13,000,000 15,000,000 17,000,000 7,000,000 5,000,000 15,000,000 6,000,000 7,000,000 5,000,000 5,000,000 3,000,000  1,000,000 1,000,000  
      interest expense, net of amounts capitalized
    		-173,000,000 -154,000,000 -112,000,000 -116,000,000 -91,000,000 -80,000,000 -74,000,000 -117,000,000 3,000,000 -232,000,000 -168,000,000 -249,000,000 -263,000,000 -96,000,000 -100,000,000 -102,000,000 -107,000,000 -110,000,000 -115,000,000 -115,000,000 -117,000,000 -145,000,000 -153,000,000 -160,000,000 -160,000,000 -166,000,000 -168,000,000 -166,000,000 -165,000,000 -160,000,000 -148,000,000 -147,000,000 -123,000,000 -112,000,000 -129,000,000 -127,000,000 -113,000,000 -112,000,000 -95,000,000 -89,000,000 -87,000,000 -109,000,000 -120,000,000 -116,000,000 -123,000,000 -122,000,000 -112,000,000 -126,000,000 -139,000,000 -142,000,000 -146,000,000 -157,000,000 -180,000,000 -183,000,000 -180,000,000 -178,000,000 -151,000,000 -147,000,000 -145,000,000 -152,000,000 -142,000,000 -141,000,000  -119,000,000     
      gain on retirement of debt
    		     21,000,000 140,000,000  1,000,000    1,750,000 7,000,000      51,000,000   4,000,000          -6,000,000  -48,000,000   110,000,000 38,000,000                              
      other
    		2,000,000 -78,000,000 -27,000,000 4,000,000 13,000,000 8,000,000 12,000,000 12,000,000 -26,000,000 12,000,000 18,000,000 5,000,000 -3,000,000 -6,000,000 3,000,000 1,000,000 -3,000,000 3,000,000 14,000,000 9,000,000 -4,000,000 21,000,000 -56,000,000 12,000,000 147,000,000 3,000,000 23,000,000 8,000,000 40,000,000 16,000,000  -10,000,000 -3,000,000 6,000,000  3,000,000 34,000,000 7,000,000 3,000,000  15,000,000 3,000,000 -5,000,000 47,000,000 10,000,000 6,000,000 8,000,000 -2,000,000 -7,000,000 -4,000,000 -16,000,000 -1,000,000 -8,000,000 -6,000,000 -7,000,000 -2,000,000 -77,000,000 -5,000,000 3,000,000 -8,000,000 8,000,000 -3,000,000 15,000,000 23,000,000 9,000,000  6,000,000  
      loss before income tax expense
    		-757,500,000 -1,897,000,000  -40,000,000    -93,000,000 -83,000,000 -263,000,000 -181,000,000 -414,000,000 -315,000,000 -33,000,000 -65,000,000 -149,000,000   -99,000,000 -119,000,000   -465,000,000  -79,000,000 -771,000,000 -169,000,000 -179,000,000 -410,500,000 -439,000,000 -1,054,000,000                                      
      income tax expense
    		57,000,000 26,000,000 -155,000,000 39,000,000   156,000,000 -191,000,000 21,000,000 -43,000,000 -16,000,000 51,000,000 35,000,000 -5,000,000 3,000,000 26,000,000 111,000,000 27,000,000 4,000,000  23,000,000 -24,000,000 32,000,000  -24,000,000 54,000,000 37,000,000  110,000,000 -30,000,000 85,000,000 63,000,000 -9,000,000 180,000,000 -37,000,000 -40,000,000 25,000,000  17,000,000 74,000,000 66,000,000 17,000,000 40,000,000 83,000,000 10,000,000 -16,000,000 72,000,000 80,000,000 46,000,000 63,000,000 130,000,000 19,000,000 104,000,000  24,000,000 132,000,000 100,000,000 82,000,000 81,000,000 -34,000,000 118,000,000 98,000,000 129,000,000 181,000,000 138,000,000 184,000,000 251,000,000  
      net income
    		25,000,000 -1,923,000,000 -938,000,000 -79,000,000 7,000,000 -494,000,000 -123,000,000 98,000,000 -104,000,000 -220,000,000 -165,000,000 -465,000,000 -350,000,000 -28,000,000 -68,000,000 -175,000,000 -260,000,000 -130,000,000 -103,000,000 -98,000,000 -39,000,000 359,000,000 -497,000,000 -391,000,000 -55,000,000 -825,000,000 -206,000,000 -171,000,000 -243,000,000 -409,000,000 -1,139,000,000 -212,000,000 -102,000,000 -1,411,000,000 -1,679,000,000 95,000,000 240,000,000 244,000,000 88,000,000 255,000,000 617,000,000 330,000,000 348,000,000 -469,000,000 -766,000,000 -2,263,000,000 597,000,000 466,000,000 235,000,000 548,000,000 311,000,000 313,000,000 -383,000,000 -303,000,000 59,000,000 -6,076,000,000 -60,000,000 164,000,000 340,000,000 -795,000,000 378,000,000 720,000,000 685,000,000 717,000,000 706,000,000 808,000,000 939,000,000  
      yoy
    		257.14% 289.27% 662.60% -180.61% -106.73% 124.55% -25.45% -121.08% -70.29% 685.71% 142.65% 165.71% 34.62% -78.46% -33.98% 78.57% 566.67% -136.21% -79.28% -74.94% -29.09% -143.52% 141.26% 128.65% -77.37% 101.71% -81.91% -19.34% 138.24% -71.01% -32.16% -323.16% -142.50% -678.28% -2007.95% -62.75% -61.10% -26.06% -74.71% -154.37% -180.55% -114.58% -41.71% -200.64% -425.96% -512.96% 91.96% 48.88% -161.36% -280.86% 427.12% -105.15% 538.33% -284.76% -82.65% 664.28% -115.87% -77.22% -50.36% -210.88% -46.46% -10.89% -27.05%      
      qoq
    		-101.30% 105.01% 1087.34% -1228.57% -101.42% 301.63% -225.51% -194.23% -52.73% 33.33% -64.52% 32.86% 1150.00% -58.82% -61.14% -32.69% 100.00% 26.21% 5.10% 151.28% -110.86% -172.23% 27.11% 610.91% -93.33% 300.49% 20.47% -29.63% -40.59% -64.09% 437.26% 107.84% -92.77% -15.96% -1867.37% -60.42% -1.64% 177.27% -65.49% -58.67% 86.97% -5.17% -174.20% -38.77% -66.15% -479.06% 28.11% 98.30% -57.12% 76.21% -0.64% -181.72% 26.40% -613.56% -100.97% 10026.67% -136.59% -51.76% -142.77% -310.32% -47.50% 5.11% -4.46% 1.56% -12.62% -13.95%   
      net income attributable to noncontrolling interest
    		                   1,000,000 250,000   1,000,000 -4,000,000  2,000,000      9,000,000 6,000,000 11,000,000 4,000,000 17,000,000 15,000,000 11,000,000 6,000,000 6,000,000 9,000,000 6,000,000 14,000,000 -27,000,000 -46,000,000 10,000,000 10,000,000 -500,000 2,000,000 4,000,000 -8,000,000 -2,000,000 1,000,000 17,000,000 43,000,000 11,000,000 9,000,000 30,000,000 4,000,000 10,000,000 5,000,000 8,000,000   2,000,000   
      net loss attributable to controlling interest
    		25,000,000 -1,923,000,000 -938,000,000  7,000,000 -494,000,000 -123,000,000  -104,000,000 -220,000,000 -165,000,000 -465,000,000 -350,000,000 -28,000,000 -68,000,000 -175,000,000   -103,000,000 -99,000,000   -497,000,000 -392,000,000 -51,000,000 -825,000,000 -208,000,000 -171,000,000 -438,500,000 -409,000,000 -1,135,000,000                                      
      loss per share
    		                                                                    
      basic
    		0.19 -2   0.02 -0.56                 -0.81 -0.64 -0.08 -1.35 -0.34 -0.28 -0.965 -0.88 -2.46                                      
      diluted
    		0.19 -2   -0.11 -0.58                 -0.81 -0.64 -0.08 -1.35 -0.34 -0.28 -0.965 -0.88 -2.46                                      
      weighted-average shares outstanding
    		                                                                    
      basic
    		960 961  883 850 879  819          653    616 615 614 612 613 612 611 468 463 462 438 391 391 391 390 367 365 365 364 363   363 362 362 362 361 360 360 360 360 359 353 350 322 320 320 319 320 319 319 321 320  320 319  
      diluted
    		960 961  958 925 954  955          653    702 615 614 612 613 612 611 468 463 462 438 391 391 391 390 367 365 365 364 363   363 362 362 362 361 360 361 360 360 359 353 350 322 320 320 320 320 319 320 322 321  321 320  
      income before income tax expense
    		  -1,093,000,000    33,000,000          -80,250,000 -103,000,000   -131,250,000 335,000,000          -149,000,000 -723,000,000 -1,231,000,000                          -829,000,000 496,000,000 818,000,000 814,000,000 898,000,000 844,000,000 992,000,000 1,190,000,000  
      loss per share, basic and diluted
    		  -1.06    -0.15  -0.11 -0.28 -0.22 -0.64 -0.5 -0.04 -0.1 -0.26   -0.17 -0.16                                                 
      weighted-average shares outstanding, basic and diluted
    		  888                                                                  
      net income attributable to controlling interest
    		   -79,000,000    98,000,000         -83,000,000 -130,000,000   -132,500,000 359,000,000          -210,000,000 -111,000,000 -1,417,000,000 -1,690,000,000 91,000,000 223,000,000 229,000,000 77,000,000 249,000,000 611,000,000 321,000,000 342,000,000 -483,000,000 -739,000,000 -2,217,000,000 587,000,000 456,000,000 233,000,000 546,000,000 307,000,000 321,000,000 -381,000,000 -304,000,000 42,000,000 -6,119,000,000 -71,000,000 155,000,000 310,000,000 -799,000,000 368,000,000 715,000,000 677,000,000 723,000,000 710,000,000 806,000,000 942,000,000  
      earnings per share
    		                                  -4.32 0.23 0.58 0.62 0.21 0.68 1.67 0.88 0.93 -1.33 -2.05 -6.12 1.61 1.25 0.64 1.5 0.84 0.88 -1.06 -0.86 0.12 -19.01 -0.22 0.48 0.96          
      basic
    		   -0.09    0.12         -0.133 -0.2   -0.215 0.58          -0.48                            -2.48 1.15 2.23 2.1 2.24 2.2 2.5 2.94  
      diluted
    		   -0.11    0.11         -0.133 -0.2   -0.215 0.51          -0.48                            -2.48 1.15 2.22 2.09 2.23 2.19 2.49 2.93  
      loss on disposal of assets
    		    -7,000,000 -4,000,000  -6,000,000 -10,000,000 -3,000,000   -4,000,000 -3,000,000   -1,000,000 -3,000,000  -59,000,000 -20,000,000 -64,000,000   -5,000,000 -4,000,000         -1,595,000,000      -5,000,000 -15,000,000  -7,000,000    -3,000,000   -2,000,000 -7,000,000                 
      loss before income tax benefit
    		    -146,250,000 -525,000,000                  -395,000,000                                             
      income tax benefit
    		    -16,500,000 -31,000,000              -21,000,000    -4,000,000                                             
      weighted-average shares, basic and diluted
    		      824  768 774 761 728 699 714 692 664 637  621 617 615                                                
      loss on retirement of debt
    		           -32,000,000            -57,000,000 -2,000,000 -12,000,000 -9,000,000 -18,000,000                                -13,000,000 -22,000,000   -12,000,000     
      loss on impairment
    		                      -429,000,000 -168,000,000 -25,000,000 -583,000,000 -1,000,000  -18,000,000 -432,000,000 -1,014,000,000   -1,385,000,000 -113,000,000  -59,000,000 -11,000,000 -20,000,000  -28,000,000 -13,000,000 -890,000,000 -936,000,000 -1,210,000,000 -2,768,000,000  -65,000,000 -27,000,000 -17,000,000 -37,000,000   -12,000,000 -227,000,000 -5,201,000,000 -3,000,000 -25,000,000  -1,010,000,000         
      gain on restructuring and retirement of debt
    		                    137,000,000 449,000,000                                               
      net loss attributable to noncontrolling interest
    		                                                               -6,000,000     
      other revenues
    		                                40,000,000 109,000,000 46,000,000 47,000,000 181,000,000 20,000,000 25,000,000 230,000,000 395,000,000 39,000,000 107,000,000 43,000,000 70,000,000 55,000,000 50,000,000 47,000,000 130,000,000 156,000,000 76,000,000 52,000,000 130,000,000 185,000,000 117,000,000 171,000,000 169,000,000 238,000,000 184,000,000 115,000,000 82,000,000 186,000,000 128,000,000 143,000,000 163,000,000 182,000,000 180,000,000  
      depreciation
    		                            204,000,000 201,000,000 211,000,000 202,000,000 184,000,000 197,000,000 219,000,000 232,000,000 226,000,000 225,000,000 225,000,000 217,000,000 213,000,000 210,000,000 249,000,000 291,000,000 290,000,000 288,000,000 288,000,000 273,000,000 275,000,000 273,000,000 286,000,000 275,000,000                 
      operating revenues
    		                                                                    
      earnings per share
    		                                  -4.32 0.23 0.58 0.62 0.21 0.68 1.67 0.88 0.93 -1.33 -2.05 -6.12 1.61 1.25 0.64 1.5 0.84 0.88 -1.06 -0.86 0.12 -19.01 -0.22 0.48 0.96          
      earnings per share—basic
    		                                -1.93 -3.62                                   
      earnings per share—diluted
    		                                -1.93 -3.62                                   
      income from continuing operations before income tax expense
    		                                  -1,716,000,000 55,000,000 265,000,000 235,000,000 104,000,000 330,000,000 683,000,000 344,000,000 387,000,000 -384,000,000 -752,000,000 -2,278,000,000 676,000,000 554,000,000 274,000,000 607,000,000 451,000,000 332,000,000 630,000,000 -339,000,000 98,000,000 -5,970,000,000 47,000,000 244,000,000 245,000,000          
      income from continuing operations
    		                                  -1,679,000,000 95,000,000 240,000,000 244,000,000 87,000,000 256,000,000 617,000,000 327,000,000 347,000,000 -467,000,000 -762,000,000 -2,262,000,000 604,000,000 474,000,000 228,000,000 544,000,000 321,000,000 313,000,000 526,000,000 -310,000,000 74,000,000 -6,102,000,000 -53,000,000 162,000,000 164,000,000          
      income from discontinued operations, net of tax
    		                                      1,000,000   3,000,000 1,000,000  -4,000,000 -1,000,000   7,000,000 4,000,000   -909,000,000 7,000,000 -15,000,000 26,000,000 -7,000,000 2,000,000 176,000,000          
      earnings from continuing operations
    		                                  -4.32 0.23 0.58 0.62 0.21 0.68 1.68 0.87 0.93 -1.32 -2.03 -6.12 1.63 1.27 0.62 1.49 0.87 0.88 1.47 -0.88 0.16 -19.09 -0.2 0.47 0.42          
      earnings from discontinued operations
    		                                        0.003 0.01   -0.02    -0.005 0.01   -2.53 0.02 -0.04 0.08 -0.02 0.01 0.54          
      loss from discontinued operations, net of tax
    		                                           -2,000,000   -7,000,000 -8,000,000   -10,000,000                  
      earnings per share-basic
    		                                                                    
      earnings per share-diluted
    		                                                                    
      operating revenues - sum
    		                                        1,383,750,000 1,608,000,000 1,884,000,000 2,043,000,000 1,734,250,000 2,270,000,000 2,328,000,000 2,339,000,000 1,788,000,000 2,558,000,000 2,397,000,000 2,197,000,000      2,334,000,000 2,144,000,000 2,160,000,000 2,309,000,000  2,602,000,000 2,733,000,000 2,823,000,000 2,882,000,000 3,118,000,000  
      earnings per share‑basic
    		                                                                    
      earnings per share‑diluted
    		                                                                    
      weighted‑average shares outstanding
    		                                                                    
      basic
    		                                         364 363                          
      diluted
    		                                         364 363                          
      loss from discontinued operations
    		                                           -0.01   -0.02 -0.02   -0.03                  
      income tax (benefit) expense
    		                                                     -29,000,000               
      contract drilling intangible revenues
    		                                                      11,000,000 13,000,000 12,000,000 10,000,000 10,000,000 13,000,000 23,000,000 29,000,000 33,000,000 44,000,000 58,000,000 75,000,000 104,000,000  
      depreciation, depletion and amortization
    		                                                           394,000,000 394,000,000 400,000,000 401,000,000 382,000,000 367,000,000 360,000,000 355,000,000  
      gain (loss) on disposal of assets
    		                                                                    
      impairment loss
    		                                                               -83,500,000     
      loss from disposal of assets
    		                                                               -750,000     
      weighted average shares outstanding
    		                                                                    
      basic
    		                                                                321    
      diluted
    		                                                                322    
      gain from disposal of assets
    		                                                                  4,000,000  
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 
                                                                        
        assets
      		                                                                  
        cash and cash equivalents
      		620,000,000 833,000,000 377,000,000 263,000,000 560,000,000 435,000,000 475,000,000 446,000,000 762,000,000 594,000,000 821,000,000 747,000,000 683,000,000 954,000,000 729,000,000 911,000,000 976,000,000 900,000,000 988,000,000 1,066,000,000 1,154,000,000 1,382,000,000 1,511,000,000 1,483,000,000 1,790,000,000 1,906,000,000 2,243,000,000 1,886,000,000 2,160,000,000 2,307,000,000 2,506,000,000 2,712,000,000 2,717,000,000 2,471,000,000 3,093,000,000 3,052,000,000 2,534,000,000 2,153,000,000 2,574,000,000 2,339,000,000 2,234,000,000 3,769,000,000 2,682,000,000 2,635,000,000 2,873,000,000 2,117,000,000 1,987,000,000 3,243,000,000 3,559,000,000 3,357,000,000 3,689,000,000 3,964,000,000 3,982,000,000 4,017,000,000 3,286,000,000 3,389,000,000 3,812,000,000 3,394,000,000 4,636,000,000 2,888,000,000 1,586,000,000 1,130,000,000 886,000,000 907,000,000 1,302,000,000 963,000,000 
        accounts receivable
      		540,000,000 574,000,000 577,000,000 551,000,000 564,000,000 594,000,000 607,000,000 585,000,000 512,000,000 532,000,000 523,000,000 499,000,000 485,000,000 599,000,000 610,000,000 525,000,000 492,000,000 507,000,000 539,000,000 511,000,000 583,000,000 699,000,000 703,000,000 654,000,000 654,000,000    604,000,000  619,000,000 576,000,000 663,000,000 624,000,000 850,000,000  887,000,000 936,000,000 1,094,000,000  1,482,000,000 1,806,000,000 1,964,000,000  2,174,000,000 2,214,000,000 2,217,000,000  2,367,000,000 2,105,000,000 2,117,000,000 2,124,000,000 2,238,000,000  2,046,000,000 2,114,000,000 2,161,000,000  2,299,000,000 2,254,000,000 2,285,000,000  2,614,000,000 2,674,000,000 2,884,000,000  
        materials and supplies
      		378,000,000    439,000,000    426,000,000    388,000,000    392,000,000    434,000,000    479,000,000    474,000,000       561,000,000    635,000,000    818,000,000    743,000,000      627,000,000    517,000,000    462,000,000    432,000,000 
        assets held for sale
      		24,000,000 48,000,000 43,000,000 344,000,000 343,000,000 345,000,000                               6,000,000 2,000,000 8,000,000 8,000,000 9,000,000 9,000,000 23,000,000 25,000,000 50,000,000 150,000,000 160,000,000 148,000,000 131,000,000 143,000,000 128,000,000 9,000,000 53,000,000 26,000,000 118,000,000 139,000,000 77,000,000     186,000,000 186,000,000 186,000,000 244,000,000 464,000,000 
        restricted cash and cash equivalents
      		377,000,000 417,000,000 395,000,000 428,000,000 381,000,000 365,000,000 400,000,000 270,000,000 233,000,000 214,000,000 213,000,000 208,000,000 308,000,000 387,000,000 432,000,000 315,000,000 436,000,000 576,000,000 502,000,000 388,000,000 406,000,000                                              
        other current assets
      		142,000,000 163,000,000 181,000,000 165,000,000 165,000,000 179,000,000 213,000,000 133,000,000 193,000,000 217,000,000 281,000,000 187,000,000 144,000,000 131,000,000 126,000,000 142,000,000 148,000,000 165,000,000 156,000,000 161,000,000 163,000,000 187,000,000 176,000,000 164,000,000 159,000,000 200,000,000 222,000,000 170,000,000 159,000,000 169,000,000 188,000,000 164,000,000 154,000,000 137,000,000 133,000,000 121,000,000 113,000,000 81,000,000 61,000,000 84,000,000 386,000,000 214,000,000 210,000,000 242,000,000 275,000,000 299,000,000 346,000,000 325,000,000 414,000,000 414,000,000 400,000,000 452,000,000 595,000,000 621,000,000 421,000,000 438,000,000 197,000,000 169,000,000 234,000,000 184,000,000 263,000,000 171,000,000 193,000,000 192,000,000 165,000,000 230,000,000 
        total current assets
      		2,081,000,000 2,417,000,000 2,000,000,000 2,204,000,000 2,452,000,000 2,343,000,000 2,135,000,000 1,871,000,000 2,126,000,000 1,967,000,000 2,235,000,000 2,031,000,000 2,008,000,000 2,469,000,000 2,286,000,000 2,279,000,000 2,444,000,000 2,581,000,000 2,618,000,000 2,559,000,000 2,740,000,000 3,175,000,000 3,284,000,000 3,291,000,000 3,640,000,000 3,771,000,000 4,208,000,000 3,792,000,000 3,948,000,000 4,065,000,000 4,217,000,000 4,543,000,000 4,451,000,000 4,286,000,000 5,071,000,000 5,098,000,000 4,491,000,000 4,129,000,000 4,700,000,000 4,785,000,000 4,906,000,000 6,719,000,000 5,843,000,000 6,001,000,000 6,367,000,000 5,760,000,000 5,633,000,000 6,772,000,000 7,373,000,000 6,866,000,000 7,133,000,000 7,367,000,000 7,673,000,000 7,609,000,000 6,569,000,000 6,738,000,000 6,904,000,000 6,195,000,000 7,770,000,000 5,914,000,000 4,711,000,000 4,476,000,000 4,603,000,000 4,630,000,000 5,215,000,000 5,349,000,000 
        property and equipment
      		17,451,000,000 17,428,000,000 20,957,000,000 22,460,000,000 22,417,000,000 22,412,000,000 24,066,000,000 23,948,000,000 23,875,000,000 23,674,000,000 23,527,000,000 23,996,000,000 24,217,000,000 23,728,000,000 23,633,000,000 23,245,000,000 23,152,000,000 23,102,000,000 23,054,000,000 23,020,000,000 23,040,000,000 23,038,000,000 23,318,000,000 23,935,000,000 24,281,000,000 24,203,000,000 25,220,000,000 25,118,000,000 25,811,000,000 23,565,000,000 24,236,000,000 25,165,000,000 22,599,000,000 24,717,000,000 27,459,000,000 27,372,000,000 27,178,000,000 26,977,000,000 26,557,000,000 26,274,000,000 25,612,000,000 24,708,000,000 26,740,000,000 28,516,000,000 30,107,000,000 30,550,000,000 30,250,000,000 28,443,000,000 27,707,000,000 27,525,000,000 27,404,000,000 30,559,000,000 28,960,000,000 29,037,000,000 26,886,000,000 26,897,000,000 26,819,000,000 27,007,000,000 27,644,000,000 27,377,000,000 27,604,000,000 29,351,000,000 28,513,000,000 27,275,000,000 26,373,000,000 25,802,000,000 
        less accumulated depreciation
      		-4,874,000,000 -4,740,000,000 -6,205,000,000 -6,746,000,000 -6,586,000,000 -6,424,000,000 -6,983,000,000 -7,093,000,000 -6,934,000,000 -6,761,000,000 -6,607,000,000 -6,876,000,000 -6,748,000,000 -6,570,000,000 -6,394,000,000 -6,232,000,000 -6,054,000,000 -5,886,000,000 -5,718,000,000 -5,541,000,000 -5,373,000,000 -5,207,000,000 -5,309,000,000 -5,355,000,000 -5,434,000,000 -5,255,000,000 -5,626,000,000 -5,427,000,000 -5,403,000,000 -5,206,000,000 -5,278,000,000 -5,494,000,000 -5,117,000,000 -5,816,000,000 -6,493,000,000 -6,279,000,000 -6,078,000,000 -5,888,000,000 -5,668,000,000 -5,456,000,000 -5,260,000,000 -5,051,000,000 -6,174,000,000 -6,978,000,000 -8,419,000,000 -8,169,000,000 -7,897,000,000 -7,720,000,000 -7,596,000,000 -7,461,000,000 7,443,000,000 9,165,000,000 8,892,000,000 8,760,000,000 8,413,000,000 8,144,000,000 7,887,000,000 7,763,000,000 7,423,000,000 7,034,000,000 6,728,000,000 6,333,000,000 5,983,000,000 5,624,000,000 5,319,000,000 4,975,000,000 
        deferred tax assets
      		61,000,000 95,000,000 48,000,000 50,000,000 45,000,000 165,000,000 30,000,000 45,000,000 44,000,000 26,000,000 45,000,000 17,000,000 13,000,000 11,000,000 7,000,000 7,000,000 7,000,000                                                  
        other assets
      		923,000,000 974,000,000 1,011,000,000 1,051,000,000 1,043,000,000 1,014,000,000 1,077,000,000 1,166,000,000 1,139,000,000 1,091,000,000 994,000,000 988,000,000 890,000,000 908,000,000 904,000,000 920,000,000 959,000,000 947,000,000 956,000,000 974,000,000 995,000,000 997,000,000 1,008,000,000 1,000,000,000 990,000,000 1,054,000,000 1,048,000,000 1,159,000,000 448,000,000 444,000,000 444,000,000 354,000,000 341,000,000 359,000,000 371,000,000 400,000,000 329,000,000 365,000,000 369,000,000 410,000,000 493,000,000 597,000,000 696,000,000 874,000,000 895,000,000 939,000,000 924,000,000 1,080,000,000 1,145,000,000 1,306,000,000 1,523,000,000 1,769,000,000 1,632,000,000 1,745,000,000 1,223,000,000 1,070,000,000 1,001,000,000 1,026,000,000 1,015,000,000 984,000,000 970,000,000 808,000,000 751,000,000 842,000,000 856,000,000 867,000,000 
        total assets
      		15,642,000,000 16,174,000,000 17,811,000,000 19,019,000,000 19,371,000,000 19,510,000,000 20,325,000,000 19,937,000,000 20,254,000,000 20,008,000,000 20,213,000,000 20,194,000,000 20,436,000,000 20,621,000,000 20,550,000,000 20,363,000,000 20,681,000,000 20,976,000,000 21,198,000,000 21,360,000,000 21,804,000,000 22,472,000,000 22,825,000,000 23,451,000,000 24,105,000,000 24,449,000,000 25,624,000,000 25,450,000,000 25,665,000,000 23,462,000,000 24,246,000,000 25,695,000,000 22,441,000,000 23,847,000,000 26,717,000,000 26,889,000,000 26,167,000,000 25,839,000,000 26,245,000,000 26,329,000,000 25,835,000,000 26,973,000,000 27,105,000,000 28,413,000,000 29,964,000,000 32,067,000,000 31,897,000,000 32,546,000,000 32,601,000,000 32,215,000,000 32,675,000,000 34,442,000,000 34,715,000,000 35,088,000,000 36,645,000,000 36,936,000,000 37,210,000,000 36,811,000,000 39,330,000,000 37,552,000,000 36,838,000,000 36,436,000,000 36,018,000,000 35,257,000,000 35,259,000,000 35,171,000,000 
        liabilities and equity
      		                                                                  
        accounts payable
      		242,000,000 232,000,000 253,000,000 273,000,000 255,000,000 255,000,000 296,000,000 301,000,000 323,000,000 316,000,000 285,000,000 246,000,000 281,000,000 275,000,000 173,000,000 206,000,000 228,000,000 215,000,000 198,000,000 189,000,000 194,000,000 214,000,000 264,000,000 244,000,000 311,000,000 308,000,000 276,000,000 212,000,000 269,000,000 172,000,000 163,000,000 211,000,000 172,000,000 173,000,000 162,000,000 206,000,000 257,000,000 279,000,000 370,000,000 448,000,000 432,000,000 585,000,000 619,000,000 784,000,000 892,000,000 764,000,000 931,000,000 1,106,000,000 962,000,000 921,000,000 843,000,000 917,000,000 841,000,000 880,000,000 755,000,000 742,000,000 808,000,000 847,000,000 791,000,000 968,000,000 746,000,000 780,000,000 827,000,000 829,000,000 745,000,000 914,000,000 
        accrued income taxes
      		22,000,000 5,000,000 8,000,000 24,000,000 31,000,000 13,000,000 22,000,000 2,000,000 23,000,000 20,000,000 16,000,000 28,000,000 19,000,000 4,000,000 6,000,000 19,000,000 17,000,000 10,000,000 8,000,000 29,000,000 28,000,000 42,000,000 42,000,000 41,000,000 64,000,000 35,000,000 29,000,000 50,000,000 70,000,000 26,000,000 76,000,000 112,000,000 159,000,000 69,000,000 76,000,000 95,000,000 105,000,000 57,000,000 89,000,000 82,000,000 82,000,000 76,000,000 217,000,000 131,000,000 130,000,000 83,000,000 74,000,000 53,000,000 176,000,000 131,000,000 111,000,000 121,000,000 70,000,000 89,000,000 23,000,000 26,000,000 67,000,000 116,000,000 226,000,000 154,000,000 240,000,000 240,000,000 136,000,000 235,000,000 299,000,000 317,000,000 
        debt due within one year
      		445,000,000 1,372,000,000 666,000,000 712,000,000 686,000,000 457,000,000 526,000,000 463,000,000 370,000,000 320,000,000 293,000,000 283,000,000 719,000,000 750,000,000 847,000,000 636,000,000 513,000,000 575,000,000 536,000,000 524,000,000 505,000,000 640,000,000 578,000,000 581,000,000 568,000,000 349,000,000 349,000,000 343,000,000 373,000,000 372,000,000 1,816,000,000 1,879,000,000 799,000,000 865,000,000 1,458,000,000 724,000,000 1,069,000,000 1,063,000,000 1,200,000,000 1,093,000,000 123,000,000 1,026,000,000 1,024,000,000 1,033,000,000 362,000,000 159,000,000 162,000,000 160,000,000 162,000,000 161,000,000 236,000,000 2,772,000,000 2,695,000,000 1,942,000,000 1,830,000,000 1,820,000,000 1,965,000,000 1,917,000,000 1,635,000,000 1,580,000,000 1,447,000,000 1,868,000,000 702,000,000 1,163,000,000 2,040,000,000 664,000,000 
        other current liabilities
      		627,000,000 626,000,000 655,000,000 647,000,000 691,000,000 706,000,000 729,000,000 619,000,000 681,000,000 525,000,000 547,000,000 496,000,000 539,000,000 476,000,000 507,000,000 491,000,000 545,000,000 551,000,000 577,000,000 561,000,000 659,000,000 655,000,000 704,000,000 728,000,000 781,000,000 797,000,000 807,000,000 791,000,000 746,000,000 752,000,000 771,000,000 820,000,000 755,000,000 751,000,000 851,000,000 960,000,000 875,000,000 800,000,000 929,000,000 1,046,000,000 1,193,000,000 1,215,000,000 1,313,000,000 1,822,000,000 2,162,000,000 2,391,000,000 1,596,000,000 2,072,000,000 2,418,000,000 2,552,000,000 2,158,000,000 2,888,000,000 2,061,000,000 2,350,000,000 1,566,000,000 1,800,000,000 906,000,000 861,000,000 2,030,000,000 1,884,000,000 787,000,000 730,000,000 919,000,000 732,000,000 705,000,000 806,000,000 
        total current liabilities
      		1,336,000,000 2,235,000,000 1,582,000,000 1,656,000,000 1,663,000,000 1,431,000,000 1,573,000,000 1,385,000,000 1,397,000,000 1,181,000,000 1,141,000,000 1,053,000,000 1,558,000,000 1,505,000,000 1,533,000,000 1,352,000,000 1,303,000,000 1,351,000,000 1,319,000,000 1,303,000,000 1,386,000,000 1,551,000,000 1,588,000,000 1,594,000,000 1,724,000,000 1,489,000,000 1,461,000,000 1,396,000,000 1,458,000,000 1,322,000,000 2,826,000,000 3,022,000,000 1,885,000,000 1,858,000,000 2,547,000,000 1,985,000,000 2,306,000,000 2,199,000,000 2,588,000,000 2,669,000,000 1,830,000,000 2,902,000,000 3,173,000,000 3,770,000,000 3,546,000,000 3,397,000,000 2,763,000,000 3,554,000,000 3,776,000,000 3,795,000,000 3,376,000,000 6,726,000,000 5,764,000,000 5,358,000,000 4,270,000,000 4,484,000,000 3,841,000,000 3,836,000,000 4,764,000,000 4,668,000,000 3,302,000,000 3,618,000,000 2,584,000,000 2,959,000,000 3,789,000,000 2,701,000,000 
        long-term debt
      		5,212,000,000 4,849,000,000 5,885,000,000 5,936,000,000 6,195,000,000 6,503,000,000 6,775,000,000 6,802,000,000 7,043,000,000 7,066,000,000 7,154,000,000 7,342,000,000 6,628,000,000 6,451,000,000 6,376,000,000 6,375,000,000 6,657,000,000 6,773,000,000 6,991,000,000 7,096,000,000 7,302,000,000 7,794,000,000 8,480,000,000 8,576,000,000 8,693,000,000 9,041,000,000 9,378,000,000 9,071,000,000 9,605,000,000 8,955,000,000 7,814,000,000 7,976,000,000 6,501,000,000 6,525,000,000 6,937,000,000 7,740,000,000 7,191,000,000 7,155,000,000 7,253,000,000 7,397,000,000   8,996,000,000 9,059,000,000 9,991,000,000 10,298,000,000 10,308,000,000 10,379,000,000 10,388,000,000 10,460,000,000 10,804,000,000 9,862,000,000 9,940,000,000 10,756,000,000 8,402,000,000 8,375,000,000 8,361,000,000 8,354,000,000 10,237,000,000 8,862,000,000 8,990,000,000 9,849,000,000 11,220,000,000 10,890,000,000 10,924,000,000 13,522,000,000 
        deferred tax liabilities
      		404,000,000 403,000,000 345,000,000 519,000,000 499,000,000 570,000,000 470,000,000 377,000,000 540,000,000 507,000,000 552,000,000 533,000,000 493,000,000 471,000,000 472,000,000 470,000,000 447,000,000                                                  
        other long-term liabilities
      		582,000,000 609,000,000 645,000,000 697,000,000 729,000,000 778,000,000 798,000,000 851,000,000 858,000,000 936,000,000 961,000,000 941,000,000 965,000,000 963,000,000 994,000,000 1,035,000,000 1,068,000,000 1,227,000,000 1,251,000,000 1,302,000,000 1,366,000,000 1,430,000,000 1,476,000,000 1,529,000,000 1,555,000,000 1,784,000,000 1,820,000,000 1,968,000,000 1,424,000,000 1,149,000,000 1,172,000,000 1,131,000,000 1,098,000,000 1,058,000,000 1,128,000,000 1,153,000,000 967,000,000 1,027,000,000 1,027,000,000 1,108,000,000   1,263,000,000 1,354,000,000 1,210,000,000 1,236,000,000 1,281,000,000 1,554,000,000 1,717,000,000 1,787,000,000 1,955,000,000 1,581,000,000 1,914,000,000 1,903,000,000 1,730,000,000 1,754,000,000 1,840,000,000 1,772,000,000 1,752,000,000 1,683,000,000 1,707,000,000 1,684,000,000 1,736,000,000 1,714,000,000 1,753,000,000 1,755,000,000 
        total long-term liabilities
      		6,198,000,000 5,861,000,000 6,875,000,000 7,152,000,000 7,423,000,000 7,851,000,000 8,043,000,000 8,030,000,000 8,441,000,000 8,509,000,000 8,667,000,000 8,816,000,000 8,086,000,000 7,885,000,000 7,842,000,000 7,880,000,000 8,172,000,000 8,358,000,000 8,567,000,000 8,717,000,000 8,983,000,000 9,518,000,000 10,250,000,000 10,382,000,000 10,514,000,000 11,018,000,000 11,406,000,000 11,101,000,000 11,093,000,000 10,179,000,000 9,058,000,000 9,189,000,000 7,705,000,000 7,738,000,000 8,235,000,000 9,071,000,000 8,448,000,000 8,482,000,000 8,590,000,000 8,844,000,000   10,411,000,000 10,650,000,000 11,459,000,000 11,891,000,000 11,957,000,000 12,307,000,000 12,566,000,000 12,756,000,000 13,272,000,000 12,107,000,000 13,090,000,000 13,923,000,000 11,492,000,000 11,513,000,000 11,607,000,000 11,575,000,000 13,527,000,000 12,157,000,000 12,330,000,000 12,259,000,000 13,728,000,000 13,303,000,000 13,350,000,000 15,943,000,000 
        commitments and contingencies
      		                                                                  
        shares, 0.10 par value, 1,204,009,681 authorized, 141,262,093 conditionally authorized, 1,204,009,681 issued
      		                                                                  
        and 1,101,528,481 outstanding at december 31, 2025, and 1,057,879,029 authorized, 141,262,093 conditionally
      		                                                                  
        authorized, 940,828,901 issued and 875,830,772 outstanding at december 31, 2024
      		110,000,000 110,000,000                                                                 
        additional paid-in capital
      		15,604,000,000 15,596,000,000 14,966,000,000 14,887,000,000 14,880,000,000 14,871,000,000 14,859,000,000 14,553,000,000 14,544,000,000 14,364,000,000 14,233,000,000 13,992,000,000 13,984,000,000 13,979,000,000 13,899,000,000 13,790,000,000 13,683,000,000 13,659,000,000 13,578,000,000 13,508,000,000 13,501,000,000 13,493,000,000 13,438,000,000 13,431,000,000 13,424,000,000 13,415,000,000 13,405,000,000 13,396,000,000 13,394,000,000 12,033,000,000 12,022,000,000 11,953,000,000 11,020,000,000 11,011,000,000 11,000,000,000 10,993,000,000 10,682,000,000 10,680,000,000 10,674,000,000 5,739,000,000   5,806,000,000 5,797,000,000 5,775,000,000 5,720,000,000 6,792,000,000 6,784,000,000 6,766,000,000 6,731,000,000 7,511,000,000 7,472,000,000 7,216,000,000 7,211,000,000 6,545,000,000 6,529,000,000 7,518,000,000 7,504,000,000 6,354,000,000 6,421,000,000 7,433,000,000 7,407,000,000 7,394,000,000 7,388,000,000 7,344,000,000 6,492,000,000 
        accumulated deficit
      		-7,460,000,000 -7,485,000,000 -5,562,000,000 -4,624,000,000 -4,545,000,000 -4,552,000,000 -4,058,000,000 -3,935,000,000 -4,033,000,000 -3,929,000,000 -3,709,000,000 -3,544,000,000 -3,079,000,000 -2,729,000,000 -2,701,000,000 -2,633,000,000 -2,458,000,000 -2,198,000,000 -2,068,000,000 -1,965,000,000 -1,866,000,000 -1,829,000,000 -2,188,000,000 -1,691,000,000 -1,297,000,000 -1,246,000,000 -421,000,000 -213,000,000                                       
        accumulated other comprehensive loss
      		-146,000,000 -143,000,000 -141,000,000 -141,000,000 -138,000,000 -179,000,000 -180,000,000 -179,000,000 -177,000,000 -196,000,000 -196,000,000 -196,000,000 -185,000,000 -91,000,000 -93,000,000 -94,000,000 -84,000,000 -261,000,000 -264,000,000 -267,000,000 -263,000,000 -327,000,000 -329,000,000 -331,000,000 -324,000,000 -295,000,000 -295,000,000 -296,000,000 -279,000,000 -290,000,000 -291,000,000 -292,000,000 -298,000,000 -300,000,000 -284,000,000 -283,000,000 -327,000,000 -343,000,000 -339,000,000 -334,000,000 -368,000,000 -410,000,000 -414,000,000 -404,000,000 -185,000,000 -188,000,000 -263,000,000 -262,000,000 -426,000,000 -434,000,000 -540,000,000 -516,000,000 -515,000,000 -496,000,000 -338,000,000 -328,000,000 -335,000,000 -332,000,000 -327,000,000 -336,000,000 -338,000,000 -335,000,000 -442,000,000 -449,000,000 -448,000,000 -420,000,000 
        total controlling interest shareholders’ equity
      		8,108,000,000 8,078,000,000 9,353,000,000 10,210,000,000 10,284,000,000 10,227,000,000 10,708,000,000 10,521,000,000 10,415,000,000 10,317,000,000 10,404,000,000 10,324,000,000 10,791,000,000 11,230,000,000 11,174,000,000 11,130,000,000 11,205,000,000 11,263,000,000 11,308,000,000 11,336,000,000 11,432,000,000 11,397,000,000 10,981,000,000 11,469,000,000 11,862,000,000 11,933,000,000 12,748,000,000 12,946,000,000 13,107,000,000 11,962,000,000 12,359,000,000 13,424,000,000 12,799,000,000 14,205,000,000 15,900,000,000 15,802,000,000 15,084,000,000 14,837,000,000 14,758,000,000 14,498,000,000   13,201,000,000 13,671,000,000 14,606,000,000 16,764,000,000 17,171,000,000 16,691,000,000 16,274,000,000 15,682,000,000 16,049,000,000 15,623,000,000 15,738,000,000 15,701,000,000 20,823,000,000 20,885,000,000 21,710,000,000 21,383,000,000 21,036,000,000 20,724,000,000 21,198,000,000 20,552,000,000 19,707,000,000 18,982,000,000 18,120,000,000  
        noncontrolling interest
      		  1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 4,000,000 4,000,000 4,000,000 3,000,000 6,000,000 6,000,000 6,000,000 5,000,000 9,000,000 9,000,000 7,000,000 7,000,000  3,000,000 3,000,000 4,000,000 4,000,000  3,000,000 308,000,000 303,000,000 298,000,000 310,000,000 306,000,000 308,000,000 309,000,000 311,000,000 346,000,000 11,000,000 4,000,000 -6,000,000 -15,000,000 -18,000,000 -22,000,000 -14,000,000 -15,000,000 -10,000,000 -11,000,000 -12,000,000 -5,000,000 -8,000,000 3,000,000 3,000,000 8,000,000 7,000,000 -1,000,000 13,000,000   
        total equity
      		8,108,000,000 8,078,000,000 9,354,000,000 10,211,000,000 10,285,000,000 10,228,000,000 10,709,000,000 10,522,000,000 10,416,000,000 10,318,000,000 10,405,000,000 10,325,000,000 10,792,000,000 11,231,000,000 11,175,000,000 11,131,000,000 11,206,000,000 11,267,000,000 11,312,000,000 11,340,000,000 11,435,000,000 11,403,000,000 10,987,000,000 11,475,000,000 11,867,000,000 11,942,000,000 12,757,000,000 12,953,000,000 13,114,000,000 11,961,000,000 12,362,000,000 13,427,000,000 12,803,000,000 14,209,000,000 15,900,000,000 15,805,000,000 15,392,000,000 15,140,000,000 15,056,000,000 14,808,000,000 14,026,000,000 13,648,000,000 13,510,000,000 13,982,000,000 14,952,000,000 16,775,000,000 17,175,000,000 16,685,000,000 16,259,000,000 15,664,000,000 16,027,000,000 15,609,000,000 15,723,000,000 15,691,000,000 20,812,000,000 20,873,000,000 21,705,000,000 21,375,000,000 21,039,000,000 20,727,000,000 21,206,000,000 20,559,000,000 19,706,000,000 18,995,000,000 18,120,000,000  
        total liabilities and equity
      		15,642,000,000 16,174,000,000 17,811,000,000 19,019,000,000 19,371,000,000 19,510,000,000 20,325,000,000 19,937,000,000 20,254,000,000 20,008,000,000 20,213,000,000 20,194,000,000 20,436,000,000 20,621,000,000 20,550,000,000 20,363,000,000 20,681,000,000 20,976,000,000 21,198,000,000 21,360,000,000 21,804,000,000 22,472,000,000 22,825,000,000 23,451,000,000 24,105,000,000 24,449,000,000 25,624,000,000 25,450,000,000 25,665,000,000 23,462,000,000 24,246,000,000 25,695,000,000 22,441,000,000 23,847,000,000 26,717,000,000 26,889,000,000 26,167,000,000 25,839,000,000 26,245,000,000 26,329,000,000 25,835,000,000 26,973,000,000 27,105,000,000 28,413,000,000 29,964,000,000 32,067,000,000 31,897,000,000 32,546,000,000 32,601,000,000 32,215,000,000 32,675,000,000 34,442,000,000 34,715,000,000 35,088,000,000 36,645,000,000 36,936,000,000 37,210,000,000 36,811,000,000 39,330,000,000 37,552,000,000 36,838,000,000 36,436,000,000 36,018,000,000 35,257,000,000 35,259,000,000  
        materials and supplies, net of allowance of 138 and 178 at september 30, 2025 and december 31, 2024, respectively
      		 382,000,000                                                                 
        and 1,100,992,035 outstanding at september 30, 2025, and 1,057,879,029 authorized, 141,262,093 conditionally
      		                                                                  
        materials and supplies, net of allowance of 167 and 178 at june 30, 2025 and december 31, 2024, respectively
      		  427,000,000                                                                
        and 902,249,348 outstanding at june 30, 2025, and 1,057,879,029 authorized, 141,262,093 conditionally authorized,
      		                                                                  
        940,828,901 issued and 875,830,772 outstanding at december 31, 2024
      		  90,000,000                                                                
        materials and supplies, net of allowance of 184 and 178 at march 31, 2025 and december 31, 2024, respectively
      		   453,000,000                                                               
        shares, 0.10 par value, 1,057,879,029 authorized, 141,262,093 conditionally authorized, 940,828,901 issued
      		                                                                  
        and 883,261,456 outstanding at march 31, 2025, and 0.10 par value, 1,057,879,029 authorized,
      		                                                                  
        141,262,093 conditionally authorized, 940,828,901 issued and 875,830,772 outstanding at december 31, 2024
      		   88,000,000                                                               
        contract intangible assets
      		        4,000,000 11,000,000 19,000,000 38,000,000 56,000,000 75,000,000 114,000,000 144,000,000 173,000,000 223,000,000 280,000,000 337,000,000 393,000,000 450,000,000 507,000,000 560,000,000 608,000,000 655,000,000 703,000,000 750,000,000 795,000,000 554,000,000 583,000,000 613,000,000                                   
        and 875,830,772 outstanding at december 31, 2024, and chf 0.10 par value, 1,021,294,549 authorized,
      		                                                                  
        142,362,093 conditionally authorized, 843,715,858 issued and 809,030,846 outstanding at december 31, 2023
      		    87,000,000 87,000,000 87,000,000                                                            
        materials and supplies, net of allowance of 176 and 198 at september 30, 2024 and december 31, 2023, respectively
      		     425,000,000                                                             
        and 875,803,595 outstanding at september 30, 2024, and chf 0.10 par value, 1,021,294,549 authorized,
      		                                                                  
        materials and supplies, net of allowance of 197 and 198 at june 30, 2024 and december 31, 2023, respectively
      		      440,000,000                                                            
        and 875,456,314 outstanding at june 30, 2024, and chf 0.10 par value, 1,021,294,549 authorized,
      		                                                                  
        materials and supplies, net of allowance of 202 and 198 at march 31, 2024 and december 31, 2023, respectively
      		       437,000,000                                                           
        shares, chf 0.10 par value, 1,022,394,549 authorized, 141,262,093 conditionally authorized, 862,815,858 issued
      		                                                                  
        and 819,579,665 outstanding at march 31, 2024, and 1,021,294,549 authorized, 142,362,093 conditionally
      		                                                                  
        authorized, 843,715,858 issued and 809,030,846 outstanding at december 31, 2023
      		       82,000,000                                                           
        shares, chf 0.10 par value, 1,021,294,549 authorized, 142,362,093 conditionally authorized, 843,715,858 issued
      		                                                                  
        and 809,030,846 outstanding at december 31, 2023, and 905,093,509 authorized, 142,362,675 conditionally
      		                                                                  
        authorized, 797,244,753 issued and 721,888,427 outstanding at december 31, 2022
      		        81,000,000 78,000,000 76,000,000 72,000,000                                                       
        materials and supplies, net of allowance of 206 and 199 at september 30, 2023 and december 31, 2022, respectively
      		         410,000,000                                                         
        and 782,540,300 outstanding at september 30, 2023, and 905,093,509 authorized, 142,362,675 conditionally
      		                                                                  
        materials and supplies, net of allowance of 202 and 199 at june 30, 2023 and december 31, 2022, respectively
      		          397,000,000                                                        
        shares, chf 0.10 par value, 1,021,294,549 authorized, 142,362,093 conditionally authorized, 831,845,482 issued
      		                                                                  
        and 766,655,180 outstanding at june 30, 2023, and 905,093,509 authorized, 142,362,675 conditionally
      		                                                                  
        materials and supplies, net of allowance of 201 and 199 at march 31, 2023 and december 31, 2022, respectively
      		           390,000,000                                                       
        shares, chf 0.10 par value, 905,094,091 authorized, 142,362,093 conditionally authorized, 797,245,335 issued
      		                                                                  
        and 731,847,899 outstanding at march 31, 2023, and 905,093,509 authorized, 142,362,675 conditionally
      		                                                                  
        shares, chf 0.10 par value, 905,093,509 authorized, 142,362,675 conditionally authorized, 797,244,753 issued
      		                                                                  
        and 721,888,427 outstanding at december 31, 2022, and 891,379,306 authorized, 142,363,356 conditionally
      		                                                                  
        authorized, 728,176,456 issued and 655,505,335 outstanding at december 31, 2021
      		            71,000,000 71,000,000 69,000,000 67,000,000                                                   
        materials and supplies, net of allowance of 194 and 183 at september 30, 2022 and december 31, 2021, respectively
      		             398,000,000                                                     
        and 721,888,427 outstanding at september 30, 2022, and 891,379,306 authorized, 142,363,356 conditionally
      		                                                                  
        materials and supplies, net of allowance of 191 and 183 at june 30, 2022 and december 31, 2021, respectively
      		              389,000,000                                                    
        shares, chf 0.10 par value, 905,093,509 authorized, 142,362,675 conditionally authorized, 754,244,753 issued
      		                                                                  
        and 705,711,203 outstanding at june 30, 2022, and 891,379,306 authorized, 142,363,356 conditionally
      		                                                                  
        materials and supplies, net of allowance of 188 and 183 at march 31, 2022 and december 31, 2021, respectively
      		               386,000,000                                                   
        shares, chf 0.10 par value, 891,379,306 authorized, 142,363,356 conditionally authorized, 754,244,072 issued
      		                                                                  
        and 681,055,270 outstanding at march 31, 2022, and 891,379,306 authorized, 142,363,356 conditionally
      		                                                                  
        shares, chf 0.10 par value, 891,379,306 authorized, 142,363,356 conditionally authorized, 728,176,456 issued
      		                                                                  
        and 655,505,335 outstanding at december 31, 2021, and 824,650,660 authorized, 142,363,647 conditionally
      		                                                                  
        authorized, 639,676,165 issued and 615,140,276 outstanding at december 31, 2020
      		                64,000,000 63,000,000 62,000,000 60,000,000                                               
        materials and supplies, net of allowance of 148 and 143 at september 30, 2021 and december 31, 2020, respectively
      		                 433,000,000                                                 
        deferred income taxes
      		                 9,000,000 8,000,000 11,000,000 9,000,000 19,000,000 17,000,000 20,000,000 20,000,000 21,000,000 71,000,000 58,000,000 66,000,000 40,000,000 44,000,000 54,000,000 167,000,000 301,000,000 309,000,000 298,000,000 247,000,000 256,000,000 287,000,000 316,000,000 99,000,000 180,000,000 157,000,000 161,000,000 160,000,000 162,000,000 155,000,000 151,000,000 173,000,000 167,000,000 151,000,000 142,000,000 142,000,000 142,000,000 120,000,000 112,000,000 116,000,000 115,000,000 100,000,000 121,000,000 113,000,000 104,000,000 87,000,000 46,000,000 50,000,000 63,000,000 
        shares, chf 0.10 par value, 891,379,306 authorized, 142,363,356 conditionally authorized, 685,676,456 issued
      		                                                                  
        and 651,155,650 outstanding at september 30, 2021, and 824,650,660 authorized, 142,363,647 conditionally
      		                                                                  
        materials and supplies, net of allowance of 145 and 143 at june 30, 2021 and december 31, 2020, respectively
      		                  433,000,000                                                
        shares, chf 0.10 par value, 891,379,015 authorized, 142,363,647 conditionally authorized, 685,676,165 issued
      		                                                                  
        and 634,629,502 outstanding at june 30, 2021, and 824,650,660 authorized, 142,363,647 conditionally
      		                                                                  
        materials and supplies, net of allowance of 144 and 143 at march 31, 2021 and december 31, 2020, respectively
      		                   433,000,000                                               
        shares, chf 0.10 par value, 824,650,668 authorized, 142,363,647 conditionally authorized, 639,676,165 issued
      		                                                                  
        and 617,288,705 outstanding at march 31, 2021, and 824,650,660 authorized, 142,363,647 conditionally
      		                                                                  
        shares, chf 0.10 par value, 824,650,660 authorized, 142,363,647 conditionally authorized, 639,676,165 issued
      		                                                                  
        and 615,140,276 outstanding at december 31, 2020, and 639,674,422 authorized, 142,365,398 conditionally
      		                                                                  
        authorized, 617,970,525 issued and 611,871,374 outstanding at december 31, 2019
      		                    60,000,000 60,000,000 60,000,000 60,000,000                                           
        materials and supplies, net of allowance of 118 and 127 at september 30, 2020 and december 31, 2019, respectively
      		                     459,000,000                                             
        restricted cash accounts and investments
      		                     448,000,000 437,000,000 531,000,000 558,000,000 551,000,000 610,000,000 583,000,000 551,000,000 561,000,000 490,000,000 484,000,000                                   
        shares, chf 0.10 par value, 824,648,925 authorized, 142,365,398 conditionally authorized, 639,674,414 issued
      		                                                                  
        and 614,861,972 outstanding at september 30, 2020, and 639,674,422 authorized, 142,365,398 conditionally
      		                                                                  
        materials and supplies, net of allowance of 122 and 127 at june 30, 2020 and december 31, 2019, respectively
      		                      457,000,000                                            
        and 614,612,545 outstanding at june 30, 2020, and 639,674,422 authorized, 142,365,398 conditionally
      		                                                                  
        materials and supplies, net of allowance of 127 at march 31, 2020 and december 31, 2019
      		                       459,000,000                                           
        shares, chf 0.10 par value, 639,674,422 authorized, 142,365,398 conditionally authorized, 617,970,525 issued
      		                                                                  
        and 614,545,303 outstanding at march 31, 2020, and 639,674,422 authorized, 142,365,398 conditionally
      		                                                                  
        and 611,871,374 outstanding at december 31, 2019, and 638,285,574 authorized, 143,754,246 conditionally
      		                                                                  
        authorized, 610,581,677 issued and 609,649,291 outstanding at december 31, 2018
      		                        59,000,000 59,000,000 59,000,000 59,000,000                                       
        of less than 1 at december 31, 2018
      		                         639,000,000 645,000,000                                        
        materials and supplies, net of allowance for obsolescence
      		                                                                  
        of 123 and 134 at september 30, 2019 and december 31, 2018, respectively
      		                         475,000,000                                         
        and 611,849,468 outstanding at september 30, 2019, and 638,285,574 authorized, 143,754,246 conditionally
      		                                                                  
        of 133 and 134 at june 30, 2019 and december 31, 2018, respectively
      		                          488,000,000                                        
        and 611,741,184 outstanding at june 30, 2019, and 638,285,574 authorized, 143,754,246 conditionally
      		                                                                  
        of less than 1 at march 31, 2019 and december 31, 2018
      		                           665,000,000                                       
        of 135 and 134 at march 31, 2019 and december 31, 2018, respectively
      		                           488,000,000                                       
        shares, chf 0.10 par value, 639,674,422 authorized, 142,365,398 conditionally authorized, 611,970,525 issued
      		                                                                  
        and 611,614,353 outstanding at march 31, 2019, and 638,285,574 authorized, 143,754,246 conditionally
      		                                                                  
        short-term investments
      		                               150,000,000                              38,000,000 180,000,000 174,000,000 112,000,000 333,000,000 
        redeemable noncontrolling interest
      		                               57,000,000 48,000,000 42,000,000 35,000,000 28,000,000 21,000,000 18,000,000 11,000,000 8,000,000 15,000,000 10,000,000 11,000,000 11,000,000 7,000,000 4,000,000 2,000,000      138,000,000 116,000,000 71,000,000 66,000,000 57,000,000 25,000,000         
        shares, chf 0.10 par value, 638,285,574 authorized, 143,754,246 conditionally authorized, 610,581,677 issued
      		                                                                  
        and 609,649,291 outstanding at december 31, 2018, and 417,060,033 authorized, 143,783,041 conditionally
      		                                                                  
        authorized, 394,801,990 issued and 391,237,308 outstanding at december 31, 2017
      		                            59,000,000 44,000,000                                     
        retained earnings
      		                            -67,000,000 175,000,000 584,000,000 1,719,000,000 2,040,000,000 3,457,000,000 5,147,000,000 5,056,000,000 4,695,000,000 4,466,000,000 4,389,000,000 4,140,000,000 3,529,000,000 3,208,000,000 2,866,000,000 3,349,000,000 4,088,000,000 6,305,000,000 5,718,000,000 5,262,000,000 5,029,000,000 4,483,000,000 4,176,000,000 3,780,000,000 4,286,000,000 4,244,000,000 10,363,000,000 10,434,000,000 10,279,000,000 9,969,000,000 10,768,000,000 10,400,000,000 9,685,000,000 9,008,000,000 8,285,000,000 7,575,000,000 6,769,000,000 6,008,000,000 
        of less than 1 at september 30, 2018 and december 31, 2017
      		                             627,000,000                                     
        of 139 and 141 at september 30, 2018 and december 31, 2017, respectively
      		                             401,000,000                                     
        shares, chf 0.10 par value, 490,584,698 authorized, 143,754,927 conditionally authorized, 462,880,809 issued
      		                                                                  
        and 461,903,386 outstanding at september 30, 2018, and 417,060,033 authorized, 143,783,041 conditionally
      		                                                                  
        materials and supplies, net of allowance for obsolescence of 145 and 141 at june 30, 2018 and december 31, 2017, respectively
      		                              414,000,000                                    
        shares, chf 0.10 par value, 490,568,452 authorized, 143,771,173 conditionally authorized, 462,864,563 issued and 461,862,248 outstanding at june 30, 2018, and 417,060,033 authorized, 143,783,041 conditionally authorized, 394,801,990 issued and 391,237,308 outstanding at december 31, 2017
      		                              44,000,000                                    
        materials and supplies, net of allowance for obsolescence of 149 and 141 at march 31, 2018 and december 31, 2017, respectively
      		                               457,000,000                                   
        goodwill
      		                               460,000,000             1,014,000,000 2,987,000,000 2,987,000,000 2,987,000,000 2,987,000,000 2,987,000,000 2,987,000,000 3,099,000,000 3,087,000,000 3,205,000,000 8,132,000,000 8,132,000,000 8,132,000,000 8,132,000,000 8,132,000,000 8,132,000,000 8,132,000,000 8,134,000,000 8,134,000,000 8,134,000,000 8,134,000,000 8,128,000,000 
        shares, chf 0.10 par value, 509,382,402 authorized, 143,783,041 conditionally authorized, 462,853,862 issued and 461,628,198 outstanding at march 31, 2018, and 417,060,033 authorized, 143,783,041 conditionally authorized, 394,801,990 issued and 391,237,308 outstanding at december 31, 2017
      		                               44,000,000                                   
        materials and supplies, net of allowance for obsolescence of 154 and 153 at september 30, 2017 and december 31, 2016, respectively
      		                                437,000,000                                  
        restricted cash
      		                                480,000,000 537,000,000 442,000,000 466,000,000 366,000,000 360,000,000 338,000,000 340,000,000                           
        shares, chf 0.10 par value, 417,060,033 authorized, 143,783,041 conditionally authorized and 394,801,990 issued at september 30, 2017 and december 31, 2016 and 391,211,739 and 389,366,241 outstanding at september 30, 2017 and december 31, 2016, respectively
      		                                37,000,000                                  
        materials and supplies, net of allowance for obsolescence of 150 and 153 at june 30, 2017 and december 31, 2016, respectively
      		                                 517,000,000                                 
        shares, chf 0.10 par value, 417,060,033 authorized, 143,783,041 conditionally authorized and 394,801,990 issued at june 30, 2017 and december 31, 2016 and 391,181,430 and 389,366,241 outstanding at june 30, 2017 and december 31, 2016, respectively
      		                                 37,000,000                                 
        materials and supplies, net of allowance for obsolescence of 154 and 153 at march 31, 2017 and december 31, 2016, respectively
      		                                  553,000,000                                
        shares, chf 0.10 par value, 417,060,033 authorized, 143,783,041 conditionally authorized and 394,801,990 issued at march 31, 2017 and december 31, 2016 and 390,930,439 and 389,366,241 outstanding at march 31, 2017 and december 31, 2016, respectively
      		                                  37,000,000                                
        trade
      		                                   833,000,000    1,343,000,000    2,084,000,000    2,112,000,000      2,049,000,000    1,811,000,000    2,330,000,000    2,798,000,000 
        other
      		                                   65,000,000    36,000,000    36,000,000    50,000,000      127,000,000    189,000,000    55,000,000    66,000,000 
        shares, chf 0.10 par value, 417,060,033 authorized, 143,783,041 conditionally authorized, 394,801,990 issued and 389,366,241 outstanding at december 31, 2016 and chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 364,035,397 outstanding at december 31, 2015
      		                                   36,000,000                               
        treasury shares, at cost, 2,863,267 held at december 31, 2015
      		                                                                  
        materials and supplies, net of allowance for obsolescence of 159 and 148 at september 30, 2016 and december 31, 2015, respectively
      		                                    585,000,000                              
        shares, chf 0.10 par value, 393,397,220 authorized, 167,617,649 conditionally authorized, 370,967,382 issued and 365,461,629 outstanding at september 30, 2016 and chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 364,035,397 outstanding at december 31, 2015
      		                                    34,000,000                              
        materials and supplies, net of allowance for obsolescence of 159 and 148 at june 30, 2016 and december 31, 2015, respectively
      		                                     597,000,000                             
        shares, chf 0.10 par value, 393,397,220 authorized, 167,617,649 conditionally authorized, 370,967,382 issued and 365,389,695 outstanding at june 30, 2016 and chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 364,035,397 outstanding at december 31, 2015
      		                                     34,000,000                             
        materials and supplies, net of allowance for obsolescence of 154 and 148 at march 31, 2016 and december 31, 2015, respectively
      		                                      625,000,000                            
        shares, chf 0.10 par value, 393,397,220 authorized, 167,617,649 conditionally authorized, 370,967,382 issued and 365,081,912 outstanding at march 31, 2016 and chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 364,035,397 outstanding at december 31, 2015
      		                                      34,000,000                            
        shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued at december 31, 2015 and 2014 and 364,035,397 and 362,279,530 outstanding at december 31, 2015 and 2014, respectively.
      		                                       5,193,000,000                           
        treasury shares, at cost, 2,863,267 held at december 31, 2015 and 2014
      		                                       -240,000,000                           
        materials and supplies, net of allowance for obsolescence of 139 and 109 at september 30, 2015 and december 31, 2014, respectively
      		                                        696,000,000                          
        long‑term debt
      		                                        8,630,000,000 8,989,000,000                         
        other long‑term liabilities
      		                                        1,162,000,000 1,236,000,000                         
        total long‑term liabilities
      		                                        9,964,000,000 10,413,000,000                         
        shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued at september 30, 2015 and december 31, 2014 and 363,719,800 and 362,279,530 outstanding at september 30, 2015 and december 31, 2014, respectively
      		                                        5,189,000,000                          
        additional paid‑in capital
      		                                        5,610,000,000 5,596,000,000                         
        treasury shares, at cost, 2,863,267 held at september 30, 2015 and december 31, 2014
      		                                        -240,000,000                          
        total controlling interest shareholders' equity
      		                                        13,720,000,000 13,340,000,000                         
        materials and supplies, net of allowance for obsolescence of 107 and 109 at june 30, 2015 and december 31, 2014, respectively
      		                                         741,000,000                         
        shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued at june 30, 2015 and december 31, 2014 and 363,548,290 and 362,279,530 outstanding at june 30, 2015 and december 31, 2014, respectively
      		                                         5,186,000,000                         
        treasury shares, at cost, 2,863,267 held at june 30, 2015 and december 31, 2014
      		                                         -240,000,000                         
        materials and supplies, net of allowance for obsolescence of 112 and 109 at march 31, 2015 and december 31, 2014, respectively
      		                                          807,000,000                        
        shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued at march 31, 2015 and december 31, 2014 and 363,346,369 and 362,279,530 outstanding at march 31, 2015 and december 31, 2014, respectively
      		                                          5,183,000,000                        
        treasury shares, at cost, 2,863,267 held at march 31, 2015 and december 31, 2014
      		                                          -240,000,000                        
        shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 362,279,530 outstanding at december 31, 2014 and 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,764,100 outstanding at december 31, 2013
      		                                           5,169,000,000                       
        treasury shares, at cost, 2,863,267 held at december 31, 2014 and 2013
      		                                           -240,000,000                       
        materials and supplies, net of allowance for obsolescence of 95 and 80 at september 30, 2014 and december 31, 2013, respectively
      		                                            835,000,000                      
        shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 362,234,868 outstanding at september 30, 2014 and 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,764,100 outstanding at december 31, 2013
      		                                            5,168,000,000                      
        treasury shares, at cost, 2,863,267 held at september 30, 2014 and december 31, 2013
      		                                            -240,000,000                      
        materials and supplies, net of allowance for obsolescence of 91 and 80 at june 30, 2014 and december 31, 2013, respectively
      		                                             818,000,000                     
        shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 362,144,405 outstanding at june 30, 2014 and 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,764,100 outstanding at december 31, 2013
      		                                             5,167,000,000                     
        treasury shares, at cost, 2,863,267 held at june 30, 2014 and december 31, 2013
      		                                             -240,000,000                     
        materials and supplies, net of allowance for obsolescence of 84 and 80 at march 31, 2014 and december 31, 2013, respectively
      		                                              768,000,000                    
        shares, chf 15.00 par value, 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 361,984,609 outstanding at march 31, 2014 and 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,764,100 outstanding at december 31, 2013
      		                                              5,164,000,000                    
        treasury shares, at cost, 2,863,267 held at march 31, 2014 and december 31, 2013
      		                                              -240,000,000                    
        property and equipment of consolidated variable interest entities, net of accumulated depreciation
      		                                               984,000,000 985,000,000 992,000,000                 
        debt of consolidated variable interest entities due within one year
      		                                               163,000,000 58,000,000 30,000,000 28,000,000 28,000,000 97,000,000 97,000,000 96,000,000 96,000,000 95,000,000 95,000,000 82,000,000 82,000,000 82,000,000      
        long-term debt of consolidated variable interest entities
      		                                                120,000,000 148,000,000 163,000,000 177,000,000 724,000,000 741,000,000 772,000,000 790,000,000 820,000,000 855,000,000 886,000,000 902,000,000 920,000,000      
        shares, chf 15.00 par value, 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,764,100 outstanding at december 31, 2013 and 402,282,355 authorized 167,617,649 conditionally authorized, 373,830,649 issued and 359,505,251 outstanding at december 31, 2012
      		                                               5,147,000,000                   
        treasury shares, at cost, 2,863,267 held at december 31, 2013 and 2012
      		                                               -240,000,000                   
        materials and supplies, net of allowance for obsolescence of 71 and 66 at september 30, 2013 and december 31, 2012, respectively
      		                                                729,000,000                  
        shares, chf 15.00 par value, 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,559,090 outstanding at september 30, 2013 and 402,282,355 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 359,505,251 outstanding at december 31, 2012
      		                                                5,145,000,000                  
        treasury shares, at cost, 2,863,267 held at september 30, 2013 and december 31, 2012
      		                                                -240,000,000                  
        materials and supplies, net of allowance for obsolescence of 70 and 66 at june 30, 2013 and december 31, 2012, respectively
      		                                                 680,000,000                 
        shares, chf 15.00 par value, 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,384,335 outstanding at june 30, 2013 and 402,282,355 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 359,505,251 outstanding at december 31, 2012
      		                                                 5,142,000,000                 
        treasury shares, at cost, 2,863,267 held at june 30, 2013 and december 31, 2012
      		                                                 -240,000,000                 
        materials and supplies, net of allowance for obsolescence of 68 and 66 at march 31, 2013 and december 31, 2012, respectively
      		                                                  648,000,000                
        property and equipment of consolidated variable interest entities
      		                                                  1,071,000,000 813,000,000 2,255,000,000 2,252,000,000 2,248,000,000 2,243,000,000 2,241,000,000 2,214,000,000 2,192,000,000 2,179,000,000 2,149,000,000      
        shares, chf 15.00 par value, 402,282,355 authorized, 167,617,649 conditionally authorized, 373,830,649 issued at march 31, 2013 and december 31, 2012; 360,340,164 and 359,505,251 outstanding at march 31, 2013 and december 31, 2012, respectively
      		                                                  5,142,000,000                
        treasury shares, at cost, 2,863,267 held at march 31, 2013 and december 31, 2012
      		                                                  -240,000,000                
        materials and supplies, net of allowance for obsolescence of 81 and 73 at june 30, 2012 and december 31, 2011, respectively
      		                                                   676,000,000               
        shares, chf 15.00 par value, 402,282,355 authorized, 167,617,649 conditionally authorized, and 373,830,649 and 365,135,298 issued at june 30, 2012 and december 31, 2011, respectively; 359,284,907 and 349,805,793 outstanding at june 30, 2012 and december 31, 2011, respectively
      		                                                   5,127,000,000               
        treasury shares, at cost, 2,863,267 held at june 30, 2012 and december 31, 2011
      		                                                   -240,000,000               
        materials and supplies, net of allowance for obsolescence of 76 and 73 at march 31, 2012 and december 31, 2011, respectively
      		                                                    663,000,000              
        shares, chf 15.00 par value, 402,282,355 authorized, 167,617,649 conditionally authorized, 365,135,298 issued at march 31, 2012 and december 31, 2011; 350,500,518 and 349,805,793 outstanding at march 31, 2012 and december 31, 2011, respectively
      		                                                    4,991,000,000              
        treasury shares, at cost, 2,863,267 held at march 31, 2012 and december 31, 2011
      		                                                    -240,000,000              
        shares, chf 15.00 par value, 365,135,298 authorized, 167,617,649 conditionally authorized, 365,135,298 issued and 349,805,793 outstanding at december 31, 2011; and 335,235,298 authorized, 167,617,649 conditionally authorized, 335,235,298 issued and 319,080,678 outstanding at december 31, 2010
      		                                                     4,982,000,000             
        treasury shares, at cost, 2,863,267 held at december 31, 2011 and 2010
      		                                                     -240,000,000             
        materials and supplies, net of allowance for obsolescence of 76 and 70 at september 30, 2011 and december 31, 2010, respectively
      		                                                      578,000,000            
        shares, chf 15.00 par value, 335,235,298 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at september 30, 2011 and december 31, 2010; 319,853,371 and 319,080,678 outstanding at september 30, 2011 and december 31, 2010, respectively
      		                                                      4,493,000,000            
        treasury shares, at cost, 2,863,267 held at september 30, 2011 and december 31, 2010
      		                                                      -240,000,000            
        materials and supplies, net of allowance for obsolescence of 73 and 70 at june 30, 2011 and december 31, 2010, respectively
      		                                                       546,000,000           
        shares, chf 15.00 par value, 335,235,298 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at june 30, 2011 and december 31, 2010; 319,639,362 and 319,080,678 outstanding at june 30, 2011 and december 31, 2010, respectively
      		                                                       4,490,000,000           
        treasury shares, at cost, 2,863,267 held at june 30, 2011 and december 31, 2010
      		                                                       -240,000,000           
        materials and supplies, net of allowance for obsolescence of 70 at march 31, 2011 and december 31, 2010
      		                                                        541,000,000          
        shares, chf 15.00 par value, 335,235,298 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at march 31, 2011 and december 31, 2010; 319,538,901 and 319,080,678 outstanding at march 31, 2011 and december 31, 2010, respectively
      		                                                        4,488,000,000          
        treasury shares, at cost, 2,863,267 held at march 31, 2011 and december 31, 2010
      		                                                        -240,000,000          
        shares, chf 15.00 par value, 335,235,298 authorized, 167,617,649 conditionally authorized, 335,235,298 issued and 319,080,678 outstanding at december 31, 2010; and 502,852,947 authorized, 167,617,649 conditionally authorized, 335,235,298 issued and 321,223,882 outstanding at december 31, 2009
      		                                                         4,482,000,000         
        treasury shares, at cost, 2,863,267 and none held at december 31, 2010 and 2009, respectively
      		                                                         -240,000,000         
        materials and supplies, net of allowance for obsolescence of 69 and 66 at september 30, 2010 and december 31, 2009, respectively
      		                                                          501,000,000        
        shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at september 30, 2010 and december 31, 2009; 319,017,904 and 321,223,882 outstanding at september 30, 2010 and december 31, 2009, respectively
      		                                                          4,481,000,000        
        treasury shares, at cost, 2,863,267 and none held at september 30, 2010 and december 31, 2009, respectively
      		                                                          -240,000,000        
        materials and supplies, net of allowance for obsolescence of 66 at june 30, 2010 and december 31, 2009
      		                                                           467,000,000       
        shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at june 30, 2010 and december 31, 2009; 318,916,207 and 321,223,882 outstanding at june 30, 2010 and december 31, 2009, respectively
      		                                                           4,479,000,000       
        treasury shares, at cost, 2,863,267 and none held at june 30, 2010 and december 31, 2009, respectively
      		                                                           -240,000,000       
        materials and supplies, net of allowance for obsolescence of 64 and 66 at march 31, 2010 and december 31, 2009, respectively
      		                                                            464,000,000      
        shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at march 31, 2010 and december 31, 2009; 320,950,624 and 321,223,882 outstanding at march 31, 2010 and december 31, 2009, respectively
      		                                                            4,478,000,000      
        treasury shares, at cost, 717,000 and none held at march 31, 2010 and december 31, 2009, respectively
      		                                                            -60,000,000      
        shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at december 31, 2009 and 2008; 321,223,882 and 319,262,113 outstanding at december 31, 2009 and 2008, respectively
      		                                                             4,472,000,000     
        materials and supplies, net of allowance for obsolescence of 57 and 49 at september 30, 2009 and december 31, 2008, respectively
      		                                                              457,000,000    
        shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 321,139,451 outstanding at september 30, 2009; 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 319,262,113 outstanding at december 31, 2008
      		                                                              4,470,000,000    
        materials and supplies, net of allowance for obsolescence of 57 and 49 at june 30, 2009 and december 31, 2008, respectively
      		                                                               451,000,000   
        shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 320,953,074 outstanding at june 30, 2009 and 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 319,262,113 outstanding at december 31, 2008
      		                                                               4,468,000,000   
        materials and supplies, net of allowance for obsolescence of 54 and 49 at march 31, 2009 and december 31, 2008, respectively
      		                                                                458,000,000  
        shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 320,004,924 outstanding at march 31, 2009 and 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 319,262,113 outstanding at december 31, 2008
      		                                                                4,455,000,000  
        liabilities and shareholders' equity
      		                                                                  
        minority interest
      		                                                                 3,000,000 
        preference shares, none authorized, issued and outstanding at december 31, 2008; preference shares 0.10 par value, 50,000,000 shares authorized, none issued and outstanding at december 31, 2007
      		                                                                  
        shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 319,262,113 outstanding at december 31, 2008; ordinary shares, 0.01 par value...
      		                                                                 4,444,000,000 
        total shareholders' equity
      		                                                                 16,524,000,000 
        total liabilities and shareholders' equity
      		                                                                 35,171,000,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 
                                                                         
          cash flows from operating activities
        		                                                                 
          net loss
        		25,000,000 -1,923,000,000   7,000,000 -494,000,000   -104,000,000 -220,000,000 -165,000,000 -465,000,000 -350,000,000 -28,000,000 -68,000,000 -175,000,000 -260,000,000 -130,000,000 -103,000,000 -98,000,000 -39,000,000 359,000,000 -497,000,000 -391,000,000 -55,000,000 -825,000,000 -206,000,000 -171,000,000  -409,000,000                                    
          adjustments to reconcile to net cash from operating activities:
        		                                                                 
          amortization of contract intangible asset
        		    0 0 0 4,000,000                                                          
          depreciation and amortization
        		147,000,000 161,000,000 175,000,000 176,000,000 180,000,000 190,000,000 184,000,000 185,000,000 184,000,000 192,000,000 186,000,000 182,000,000 186,000,000 182,000,000 184,000,000 183,000,000 184,000,000 185,000,000 186,000,000 187,000,000 189,000,000 190,000,000 196,000,000 206,000,000 207,000,000 212,000,000 219,000,000 217,000,000                        -6,000,000 351,000,000 1,087,000,000 3,000,000 5,000,000 354,000,000         
          share-based compensation expense
        		9,000,000 10,000,000 8,000,000 8,000,000 9,000,000 12,000,000 15,000,000 11,000,000 10,000,000 10,000,000 11,000,000 9,000,000 7,000,000 7,000,000 8,000,000 7,000,000 7,000,000 7,000,000 7,000,000 7,000,000 7,000,000 9,000,000 7,000,000 8,000,000 9,000,000 9,000,000 10,000,000 9,000,000 9,000,000 8,000,000 18,000,000 10,000,000 9,000,000 11,000,000 10,000,000 14,000,000 2,000,000 13,000,000 13,000,000 53,000,000 0 -5,000,000 19,000,000 74,000,000 1,000,000 -5,000,000 28,000,000 77,000,000 8,000,000 7,000,000 21,000,000 2,000,000 23,000,000 75,000,000 -7,000,000 0 27,000,000 76,000,000 8,000,000 -17,000,000 35,000,000 58,000,000 -1,000,000 5,000,000 19,000,000 
          loss on impairment of assets
        		0 1,913,000,000   0 629,000,000   -1,000,000 5,000,000                                                        
          loss on disposal of assets
        		1,000,000 1,000,000 -7,000,000 -2,000,000 7,000,000 4,000,000 0 6,000,000 10,000,000 3,000,000 0 170,000,000 4,000,000 3,000,000 4,000,000 -1,000,000 1,000,000 3,000,000 -1,000,000 59,000,000 20,000,000   1,000,000 5,000,000 4,000,000       9,000,000        17,000,000 -9,000,000 7,000,000   -4,000,000 3,000,000   -5,000,000 7,000,000     9,000,000 -8,000,000 -255,000,000        
          amortization of debt-related balances
        		12,000,000 11,000,000 12,000,000 13,000,000 14,000,000 13,000,000 13,000,000 13,000,000                                                          
          loss on adjustment to bifurcated compound exchange feature
        		                                                                 
          loss on retirement of debt
        		    0 -21,000,000   -1,000,000 0 0 32,000,000       0 -51,000,000   -4,000,000 57,000,000 2,000,000 12,000,000 9,000,000 18,000,000 0 1,000,000   1,000,000                         11,000,000    22,000,000 -1,000,000   
          loss on conversion of debt to equity
        		0                                                                 
          loss on impairment of investment in unconsolidated affiliate
        		     0 4,000,000 1,000,000              0                                            
          deferred income tax expense
        		   15,000,000 49,000,000 -35,000,000 108,000,000 -164,000,000 17,000,000 -26,000,000 -9,000,000 36,000,000 26,000,000 -5,000,000 2,000,000 23,000,000 85,000,000 32,000,000 9,000,000 2,000,000 32,000,000 -2,000,000 20,000,000 10,000,000 109,000,000 30,000,000   -66,000,000 4,000,000   71,000,000 -20,000,000 -19,000,000 57,000,000 -3,000,000                             
          other
        		1,000,000 -18,000,000 27,000,000 4,000,000 -1,000,000 -3,000,000 -7,000,000 4,000,000 -16,000,000 13,000,000 19,000,000 27,000,000 21,000,000 24,000,000 11,000,000 21,000,000 48,000,000 15,000,000 7,000,000 7,000,000 41,000,000 10,000,000 14,000,000 18,000,000 13,000,000 17,000,000 0 11,000,000 -6,000,000 7,000,000 -8,000,000 13,000,000 11,000,000 11,000,000 7,000,000 3,000,000 4,000,000 2,000,000 5,000,000 35,000,000 15,000,000 4,000,000 12,000,000 36,000,000 5,000,000 -7,000,000 12,000,000 68,000,000 -8,000,000 18,000,000 15,000,000 -1,000,000 21,000,000 30,000,000 68,000,000 17,000,000 -3,000,000 -3,000,000 8,000,000 -9,000,000 3,000,000 0 -7,000,000 3,000,000 11,000,000 
          changes in contract liabilities
        		                                                                 
          changes in deferred costs
        		33,000,000 37,000,000 28,000,000 -12,000,000 24,000,000 23,000,000 -11,000,000 -38,000,000 -65,000,000 -88,000,000 -13,000,000 -24,000,000 -22,000,000 10,000,000 17,000,000 -4,000,000 -14,000,000 1,000,000 4,000,000 3,000,000 2,000,000 14,000,000 7,000,000 -11,000,000 -12,000,000 -15,000,000   11,000,000 16,000,000 6,000,000 1,000,000 14,000,000 12,000,000 16,000,000 6,000,000 12,000,000 17,000,000 37,000,000  -33,000,000 2,000,000 57,000,000  -34,000,000 -56,000,000 38,000,000                   
          changes in other operating assets and liabilities
        		82,000,000 -18,000,000 -66,000,000 -23,000,000 31,000,000 -51,000,000 -4,000,000 -273,000,000 116,000,000 -47,000,000 -11,000,000 -171,000,000 102,000,000 23,000,000 -127,000,000 -73,000,000 68,000,000 -14,000,000 22,000,000 -39,000,000 131,000,000 -136,000,000 -181,000,000 -167,000,000 -95,000,000 1,000,000 -63,000,000 -154,000,000 289,000,000 -26,000,000 -127,000,000 98,000,000 103,000,000                                 
          net cash from operating activities
        		349,000,000 246,000,000 128,000,000 26,000,000 206,000,000 194,000,000 133,000,000 -86,000,000 98,000,000 -44,000,000 157,000,000 -47,000,000 178,000,000 230,000,000 41,000,000 -1,000,000 185,000,000 141,000,000 153,000,000 96,000,000 278,000,000 81,000,000 87,000,000 -48,000,000 147,000,000 91,000,000 153,000,000 -51,000,000 238,000,000 214,000,000 3,000,000 103,000,000 384,000,000 319,000,000 184,000,000 633,000,000 440,000,000 207,000,000 631,000,000 2,797,000,000 -663,000,000 785,000,000 526,000,000 1,338,000,000 246,000,000 500,000,000 136,000,000 1,295,000,000 207,000,000 310,000,000 106,000,000 -81,000,000 540,000,000 1,293,000,000 152,000,000 -50,000,000 390,000,000 3,237,000,000 -560,000,000 97,000,000 1,172,000,000 4,192,000,000 -170,000,000 135,000,000 1,441,000,000 
          cash flows from investing activities
        		                                                                 
          capital expenditures
        		-28,000,000 -11,000,000 -24,000,000 -60,000,000 -29,000,000 -58,000,000 -84,000,000 -83,000,000 -220,000,000 -50,000,000 -76,000,000 -81,000,000 -409,000,000 -87,000,000 -115,000,000 -106,000,000 -71,000,000 -37,000,000 -41,000,000 -59,000,000 -47,000,000 -65,000,000 -46,000,000 -107,000,000 -128,000,000 -121,000,000 -86,000,000 -52,000,000 -44,000,000 -48,000,000 -39,000,000 -53,000,000 -128,000,000 -136,000,000 -122,000,000 -272,000,000 -246,000,000 -458,000,000 -368,000,000 -1,061,000,000 -745,000,000 6,000,000 -201,000,000 -1,800,000,000 -14,000,000 780,000,000 -1,131,000,000 -1,788,000,000 -98,000,000 136,000,000 -488,000,000 24,000,000 -260,000,000 -883,000,000 156,000,000 -53,000,000 -240,000,000 -1,107,000,000 -4,000,000 79,000,000 -379,000,000 -2,512,000,000 407,000,000 -239,000,000 -708,000,000 
          free cash flows
        		321,000,000 235,000,000 104,000,000 -34,000,000 177,000,000 136,000,000 49,000,000 -169,000,000 -122,000,000 -94,000,000 81,000,000 -128,000,000 -231,000,000 143,000,000 -74,000,000 -107,000,000 114,000,000 104,000,000 112,000,000 37,000,000 231,000,000 16,000,000 41,000,000 -155,000,000 19,000,000 -30,000,000 67,000,000 -103,000,000 194,000,000 166,000,000 -36,000,000 50,000,000 256,000,000 183,000,000 62,000,000 361,000,000 194,000,000 -251,000,000 263,000,000 1,736,000,000 -1,408,000,000 791,000,000 325,000,000 -462,000,000 232,000,000 1,280,000,000 -995,000,000 -493,000,000 109,000,000 446,000,000 -382,000,000 -57,000,000 280,000,000 410,000,000 308,000,000 -103,000,000 150,000,000 2,130,000,000 -564,000,000 176,000,000 793,000,000 1,680,000,000 237,000,000 -104,000,000 733,000,000 
          investment in loans to unconsolidated affiliates
        		    0    0                                                         
          investment in equity of unconsolidated affiliates
        		                                                                 
          proceeds from disposal of assets, net of costs to sell
        		40,000,000 34,000,000 8,000,000 2,000,000 2,000,000                                                             
          proceeds from disposal of equity investment in unconsolidated affiliate
        		2,000,000 0                                                                
          cash acquired in acquisition of unconsolidated affiliates
        		    0                                                             
          net cash from investing activities
        		14,000,000 23,000,000 -12,000,000 -58,000,000 -27,000,000 -10,000,000 -73,000,000 -41,000,000 -220,000,000 -40,000,000 -73,000,000 -90,000,000 -424,000,000 -97,000,000 -116,000,000 -120,000,000 -71,000,000 -36,000,000 -73,000,000 -53,000,000 -37,000,000 -64,000,000 -44,000,000 -112,000,000 -110,000,000 -124,000,000 -57,000,000 23,000,000 -1,168,000,000 -35,000,000 30,000,000 376,000,000 -102,000,000 174,000,000 -118,000,000 -257,000,000 -245,000,000 -447,000,000 -364,000,000 -995,000,000 -781,000,000 36,000,000 -192,000,000 -1,564,000,000 -43,000,000 817,000,000 -1,038,000,000 -1,448,000,000 -49,000,000 254,000,000 -415,000,000 145,000,000 -207,000,000 -1,576,000,000 -5,000,000 -341,000,000 26,000,000 -423,000,000 -578,000,000 603,000,000 -323,000,000 -2,156,000,000 471,000,000 -530,000,000 -479,000,000 
          cash flows from financing activities
        		                                                                 
          repayments of debt
        		-1,106,000,000 -210,000,000 -30,000,000 -210,000,000 -30,000,000 -258,000,000 -1,664,000,000 -151,000,000 -10,000,000 -139,000,000 -4,000,000 -1,564,000,000 -101,000,000 -196,000,000 -92,000,000 -165,000,000 -183,000,000 -184,000,000 -100,000,000 -139,000,000 -502,000,000 -126,000,000 -100,000,000 -909,000,000 -136,000,000 -355,000,000 -218,000,000 -616,000,000 -90,000,000 -1,627,000,000 -220,000,000 -168,000,000 -96,000,000 -1,461,000,000 -72,000,000 -979,000,000 -1,065,000,000 -196,000,000 -55,000,000 -269,000,000 -1,231,000,000 57,000,000 -63,000,000 -464,000,000 -69,000,000 231,000,000 -237,000,000 -1,615,000,000 329,000,000 784,000,000 -1,190,000,000 -26,000,000 -147,000,000 -2,386,000,000 179,000,000 -155,000,000 -47,000,000 -1,874,000,000 -669,000,000 231,000,000 -253,000,000 -1,698,000,000 -465,000,000 -108,000,000 -600,000,000 
          proceeds from issuance of debt, net of issue costs
        		    3,000,000 0   319,000,000 -1,000,000 0 1,665,000,000 -1,000,000                                                     
          proceeds from issuance of shares, net of issue costs
        		0            -1,000,000 58,000,000 103,000,000 103,000,000 17,000,000 75,000,000                                                
          net cash from financing activities
        		-616,000,000 209,000,000 -35,000,000 -218,000,000 -38,000,000 -259,000,000 99,000,000 -152,000,000 309,000,000 -142,000,000 -5,000,000 101,000,000 -104,000,000 47,000,000 10,000,000 -65,000,000 -178,000,000 -119,000,000 -44,000,000 -149,000,000 -511,000,000 -135,000,000 -109,000,000 -175,000,000 -145,000,000 -363,000,000 287,000,000 -91,000,000 644,000,000 -311,000,000 -232,000,000 -248,000,000 -36,000,000 -1,115,000,000 -25,000,000 142,000,000 186,000,000 -181,000,000 -32,000,000 -563,000,000 -1,178,000,000 219,000,000 -287,000,000 -1,138,000,000 423,000,000 69,000,000 -354,000,000 -1,940,000,000 376,000,000 549,000,000 -1,136,000,000 -47,000,000 -368,000,000 1,009,000,000 173,000,000 -450,000,000 2,000,000 -2,298,000,000 1,584,000,000 146,000,000 -393,000,000 -1,848,000,000 73,000,000 -339,000,000 -623,000,000 
          net increase in unrestricted and restricted cash and cash equivalents
        		-253,000,000                          383,000,000 -119,000,000   -199,000,000 231,000,000                                  
          unrestricted and restricted cash and cash equivalents, beginning of period
        		0 0 0 941,000,000 0 0 0 995,000,000 0 0 0 991,000,000 0 0 0 1,412,000,000 0 0 0 1,560,000,000 0 0 0 2,349,000,000 0 0 0 2,589,000,000 0                                     
          unrestricted and restricted cash and cash equivalents, end of period
        		-253,000,000 478,000,000 81,000,000 691,000,000 141,000,000 -75,000,000 159,000,000 716,000,000 187,000,000 -226,000,000 79,000,000 955,000,000 -350,000,000 180,000,000 -65,000,000 1,226,000,000 -64,000,000 -14,000,000 36,000,000 1,454,000,000 -270,000,000 -118,000,000 -66,000,000 2,014,000,000 -108,000,000 -396,000,000 383,000,000 2,470,000,000 -286,000,000                                     
          gain on adjustment to bifurcated compound exchange feature
        		 14,000,000 -29,000,000 -36,000,000                                                              
          gain on retirement of debt
        		                                    -110,000,000                             
          deferred income tax benefit
        		 11,000,000                          -19,000,000                                      
          changes in deferred revenues
        		 -52,000,000 -46,000,000 -38,000,000 -53,000,000 1,000,000 20,000,000 77,000,000 30,000,000 13,000,000 21,000,000 6,000,000 29,000,000 -18,000,000 -20,000,000 -11,000,000 -21,000,000 -15,000,000 -35,000,000 -37,000,000 -28,000,000 -35,000,000 -15,000,000 5,000,000 24,000,000 15,000,000 3,000,000 1,000,000 -12,000,000 -55,000,000 -52,000,000 -20,000,000 -5,000,000 -36,000,000 -68,000,000 249,000,000 -2,000,000 -3,000,000 -25,000,000  57,000,000                         
          investment in loan to unconsolidated affiliate
        		      -1,000,000 -2,000,000                                                          
          cash acquired in acquisition of unconsolidated affiliate
        		                                                                 
          net decrease in unrestricted and restricted cash and cash equivalents
        		  81,000,000 -250,000,000    -279,000,000    -36,000,000 -350,000,000 180,000,000 -65,000,000 -186,000,000 -64,000,000 -14,000,000 36,000,000 -106,000,000 -270,000,000   -335,000,000 -108,000,000                                         
          net income
        		   -79,000,000    98,000,000                        -212,000,000 -1,411,000,000 -1,679,000,000 95,000,000 240,000,000 244,000,000 88,000,000 255,000,000 496,000,000 -18,000,000 817,000,000 -469,000,000 297,000,000 -2,860,000,000 131,000,000 466,000,000 859,000,000 237,000,000 -2,000,000 313,000,000 -362,000,000 59,000,000 -5,572,000,000 -224,000,000 -176,000,000 340,000,000 610,000,000 -342,000,000 35,000,000 685,000,000 2,464,000,000 -102,000,000 -131,000,000 939,000,000 
          loss on impairment of investment in unconsolidated affiliates
        		                                                                 
          proceeds from issuance of warrants, net of issue costs
        		            0                                                     
          fair value adjustment to bifurcated compound exchange feature
        		     -74,000,000 -69,000,000 -10,000,000 -145,000,000 93,000,000 46,000,000 133,000,000                                                      
          investment in equity of unconsolidated affiliate
        		                                                                 
          proceeds from disposal of assets
        		      7,000,000 44,000,000 0 6,000,000 3,000,000 1,000,000 3,000,000 0 3,000,000 1,000,000 1,000,000 1,000,000 1,000,000 6,000,000 9,000,000 12,000,000 2,000,000 1,000,000 18,000,000 12,000,000 28,000,000 12,000,000 6,000,000 14,000,000 10,000,000 13,000,000 1,000,000 325,000,000 4,000,000 14,000,000 1,000,000 11,000,000 4,000,000 48,000,000 -20,000,000 16,000,000 7,000,000 113,000,000 92,000,000 -81,000,000 91,000,000 4,000,000 167,000,000 2,000,000 1,000,000 103,000,000 41,000,000 89,000,000 83,000,000 -8,000,000 13,000,000   -31,000,000 41,000,000 16,000,000   8,000,000 
          investments in equity of unconsolidated affiliates
        		        0 0 0 -10,000,000 -15,000,000                                                     
          contract intangible asset amortization
        		         8,000,000 19,000,000 18,000,000 19,000,000 39,000,000 30,000,000 29,000,000 50,000,000 57,000,000 57,000,000 56,000,000 57,000,000 57,000,000 53,000,000 48,000,000 47,000,000 48,000,000 47,000,000 45,000,000 34,000,000 29,000,000 30,000,000 19,000,000                                  
          proceeds from acquisition of unconsolidated affiliate
        		                                                                 
          loss on impairment
        		                    0 0 429,000,000 168,000,000 25,000,000 583,000,000   18,000,000 432,000,000   1,385,000,000   59,000,000 11,000,000 20,000,000 3,000,000 1,854,000,000 -877,000,000 -46,000,000 936,000,000 1,275,000,000   65,000,000 64,000,000 -20,000,000   -215,000,000 227,000,000 5,226,000,000 -22,000,000      2,000,000     
          gain on restructuring and retirement of debt
        		                                                                 
          investments in loans to unconsolidated affiliates
        		                                                                 
          proceeds from maturities of unrestricted and restricted investments
        		                        0 0 0 123,000,000                                      
          investments in unconsolidated affiliates
        		              -4,000,000 -15,000,000     -2,000,000 -11,000,000 0 -6,000,000 0 -15,000,000 -2,000,000 -60,000,000                                      
          loss on restructuring and retirement of debt
        		                    -137,000,000                                             
          gain on termination of construction contracts
        		                                                                 
          investment in loans to unconsolidated affiliate
        		                                                                 
          proceeds from issuance of debt, net of discounts and issue costs
        		                    0 0 0 743,000,000     735,000,000                                     
          investments in loans to unconsolidated affiliate
        		                                                                 
          cash paid in business combinations, net of cash acquired
        		                                                                 
          deposits to unrestricted investments
        		                                                                 
          proceeds from investments restricted for financing activities
        		                            0 0 0 26,000,000                                  
          payments to terminate derivative instruments
        		                            0 0 0 -92,000,000                                  
          unrestricted and restricted cash acquired in business combination
        		                             0 0 131,000,000                                  
          proceeds from issuance of debt, net of discount and issue costs
        		                         0 516,000,000 540,000,000                                      
          gain on disposal of assets
        		                                                                 
          depreciation
        		                            204,000,000 201,000,000 211,000,000 202,000,000 197,000,000 219,000,000 232,000,000 226,000,000 225,000,000 225,000,000 217,000,000 753,000,000 -39,000,000 -42,000,000 291,000,000 851,000,000 0 15,000,000 273,000,000 836,000,000 -13,000,000 11,000,000 275,000,000               
          investment in unconsolidated affiliates
        		                            0 -1,000,000                                    
          proceeds from maturities of unrestricted and restricted short-term investments
        		                                                                 
          deposits into unrestricted and restricted short-term investments
        		                                                                 
          distributions to holders of noncontrolling interest
        		                                   -7,000,000 -7,000,000   -22,000,000 0                         
          deposits into short-term investments
        		                             0 0 -50,000,000                                  
          proceeds from maturities of short-term investments
        		                             0 150,000,000 350,000,000                                  
          unrestricted and restricted cash and cash equivalents at beginning of period
        		                              0 2,975,000,000                                  
          unrestricted and restricted cash and cash equivalents at end of period
        		                              -199,000,000 3,206,000,000                                  
          deposits to cash accounts restricted for financing activities
        		                                -21,000,000                                 
          proceeds from cash accounts and investments restricted for financing activities
        		                                81,000,000 0 50,000,000 0                              
          net increase in cash and cash equivalents
        		                                  41,000,000 518,000,000 381,000,000 -421,000,000 235,000,000 1,239,000,000 -2,622,000,000 1,040,000,000 47,000,000 -1,364,000,000 626,000,000   -2,093,000,000     -35,000,000 726,000,000 320,000,000 -841,000,000 418,000,000 516,000,000 446,000,000 846,000,000 456,000,000    339,000,000 
          cash and cash equivalents at beginning of period
        		                                0 0 3,052,000,000 0 0 0 2,339,000,000 -1,134,000,000 1,087,000,000 47,000,000 2,635,000,000 1,126,000,000 130,000,000 -1,256,000,000 3,243,000,000 1,777,000,000 -332,000,000 -1,445,000,000 5,134,000,000 -35,000,000 4,017,000,000 5,000,000 -423,000,000 418,000,000 3,394,000,000 -1,758,000,000 1,302,000,000 456,000,000 1,130,000,000 56,000,000 -395,000,000 339,000,000 963,000,000 
          cash and cash equivalents at end of period
        		                                246,000,000 -622,000,000 3,093,000,000 518,000,000 381,000,000 -421,000,000 2,574,000,000 105,000,000 -1,535,000,000 1,087,000,000 2,682,000,000 -238,000,000 756,000,000 130,000,000 1,987,000,000 -316,000,000 202,000,000 -332,000,000 3,689,000,000 -18,000,000 3,982,000,000 731,000,000 -103,000,000 -423,000,000 3,812,000,000 -1,242,000,000 1,748,000,000 1,302,000,000 1,586,000,000 244,000,000 -21,000,000 -395,000,000 1,302,000,000 
          net decrease in cash and cash equivalents
        		                                              -1,256,000,000   1,113,000,000 -1,445,000,000            374,000,000   
          changes in operating assets and liabilities
        		                                  -87,000,000 -217,000,000   128,000,000 -402,000,000 238,000,000 -14,000,000 -186,000,000 -1,266,000,000 508,000,000 389,000,000 -714,000,000 -623,000,000 34,000,000 257,000,000 -484,000,000 486,000,000 -75,000,000 655,000,000 320,000,000 -46,000,000 -184,000,000 534,000,000 -537,000,000 511,000,000 -99,000,000 221,000,000 -64,000,000 327,000,000 -50,000,000 
          proceeds from repayment of loans receivable
        		                                                                 
          investment in loans receivable
        		                                                                 
          proceeds from sale of noncontrolling interest, net of issue costs
        		                                                                 
          distributions of qualifying additional paid-in capital
        		                                                                 
          proceeds from issuance of debt, net of discount and costs
        		                                                                 
          deposit to cash account restricted for financing activities
        		                                    0 0 -24,000,000                           
          proceeds from cash investments restricted for financing activities
        		                                     24,000,000 49,000,000                           
          amortization of drilling contract intangibles
        		                                       -11,000,000 -1,000,000 1,000,000 -4,000,000 -11,000,000 0 0 -4,000,000 -10,000,000 2,000,000 2,000,000 -9,000,000 -1,000,000 -11,000,000 -33,000,000 -2,000,000 0 -10,000,000 -75,000,000 6,000,000 4,000,000 -33,000,000 -223,000,000 17,000,000 29,000,000 -104,000,000 
          loss on impairment of assets in discontinued operations
        		                                               0                  
          (gain) loss on disposal of assets
        		                                           14,000,000        -59,000,000 4,000,000 -6,000,000      -282,000,000 14,000,000     
          (gain) loss on disposal of assets in discontinued operations
        		                                                                 
          changes in deferred revenue
        		                                          -39,000,000 96,000,000 -86,000,000 122,000,000 -26,000,000 -45,000,000 -4,000,000 -23,000,000 -6,000,000 19,000,000 -12,000,000 20,000,000            
          changes in deferred expenses
        		                                               44,000,000 39,000,000 -26,000,000 17,000,000 77,000,000 -49,000,000 -79,000,000            
          proceeds from disposal of assets in discontinued operations
        		                                         -1,000,000 2,000,000 36,000,000 -23,000,000 8,000,000 14,000,000 136,000,000   63,000,000               
          proceeds from sale of preference shares
        		                                                                 
          proceeds from repayment of notes and loans receivable
        		                                                                 
          proceeds from restricted cash investments
        		                                       57,000,000   57,000,000 107,000,000   107,000,000 221,000,000 -1,000,000 -50,000,000 128,000,000 -24,000,000 108,000,000             
          deposits to restricted cash investments
        		                                              -20,000,000 -111,000,000 37,000,000 14,000,000 -59,000,000 -32,000,000 -42,000,000             
          proceeds from sale of noncontrolling interest
        		                                           0                      
          issue costs for sale of noncontrolling interest
        		                                                                 
          adjustments to reconcile to net cash from operating activities
        		                                                                 
          loss on disposal of assets in discontinued operations
        		                                              10,000,000    -15,000,000               
          deferred income taxes
        		                                        -22,000,000 106,000,000 -98,000,000  -69,000,000 -10,000,000 -15,000,000  -20,000,000 20,000,000 -28,000,000 4,000,000 -30,000,000 -17,000,000 -19,000,000 -6,000,000 11,000,000 -105,000,000 -28,000,000 10,000,000 -22,000,000 -11,000,000 4,000,000 14,000,000 6,000,000 
          proceeds from repayment of loans and notes receivable
        		                                                                 
          distributions of qualifying additional paid‑in capital
        		                                        1,000,000                         
          distribution of qualifying additional paid-in capital
        		                                          -272,000,000 -746,000,000 0 -70,000,000 -202,000,000 -404,000,000 2,000,000    -278,000,000 -509,000,000 0           
          distribution to holders of noncontrolling interest
        		                                          -7,000,000                       
          depreciation of assets in discontinued operations
        		                                                                 
          amortization of debt issue costs, discounts and premiums
        		                                               4,000,000 0   -1,000,000 18,000,000 92,000,000 -3,000,000 10,000,000 26,000,000 141,000,000 -3,000,000 2,000,000 49,000,000 158,000,000 -6,000,000 5,000,000 52,000,000 
          capital expenditures for discontinued operations
        		                                                                 
          proceeds from repayment of notes receivable
        		                                                                 
          changes in short-term borrowings
        		                                                                 
          proceeds from debt
        		                                                        5,000,000 54,000,000   54,000,000 488,000,000 -205,000,000 143,000,000 88,000,000 
          gain on disposal of assets in discontinued operations
        		                                                                 
          investment in business combination, net of cash acquired
        		                                                                 
          payment for settlement of forward exchange contract
        		                                                     0            
          proceeds from share issuance
        		                                                                 
          financing costs
        		                                                         0        
          depreciation and amortization of assets in discontinued operations
        		                                                                 
          (gain) loss on disposal of discontinued operations
        		                                                   -24,000,000 14,000,000             
          proceeds from disposal of discontinued operations
        		                                                        259,000,000         
          gain on disposal of discontinued operations
        		                                                        -173,000,000         
          purchases of marketable securities
        		                                                                 
          proceeds from insurance recoveries for loss of drilling unit
        		                                                                 
          proceeds from sale of marketable securities
        		                                                                 
          purchases of shares held in treasury
        		                                                                 
          investment in marketable security
        		                                                                 
          change in short-term borrowings
        		                                                      -3,000,000 -46,000,000 51,000,000 -239,000,000 92,000,000 85,000,000 -131,000,000 -636,000,000 730,000,000 -452,000,000 -24,000,000 
          deferred revenue
        		                                                       -49,000,000 46,000,000 158,000,000 40,000,000 -144,000,000 151,000,000 140,000,000 -20,000,000 55,000,000 -6,000,000 
          deferred expenses
        		                                                       -12,000,000 -36,000,000 -61,000,000 5,000,000 -9,000,000 -14,000,000 -35,000,000 34,000,000 -39,000,000 2,000,000 
          adjustments to reconcile net income to net cash from operating activities:
        		                                                                 
          depreciation, depletion and amortization
        		                                                         1,195,000,000 -6,000,000 -1,000,000 401,000,000 1,097,000,000 7,000,000 5,000,000 355,000,000 
          excess tax benefit from share-based compensation plans
        		                                                             7,000,000    
          proceeds from payments on notes receivable
        		                                                         27,000,000 -1,000,000       
          proceeds from short-term investments
        		                                                             535,000,000 -143,000,000   
          purchases of short-term investments
        		                                                             -235,000,000 200,000,000   
          joint ventures and other investments
        		                                                         0 -3,000,000 -11,000,000 10,000,000 40,000,000    
          proceeds from (taxes paid for) share-based compensation plans
        		                                                         1,000,000 -5,000,000 7,000,000 -4,000,000     
          adjustments to reconcile net income to net cash from operating activities
        		                                                                 
          (gain) loss on retirement of debt
        		                                                                 
          payments for warrant exercises
        		                                                                 
          proceeds from distributions from short-term investments
        		                                                            5,000,000    221,000,000 
          repurchases of convertible senior notes
        		                                                                 
          purchases of treasury shares
        		                                                            -60,000,000     
          business combination
        		                                                                 
          cash balances acquired in business combination
        		                                                                 
          repurchase of shares
        		                                                                 
          payment to shareholders for reclassification
        		                                                                 
          proceeds from share-based compensation plans
        		                                                               -12,000,000 17,000,000 
          impairment loss
        		                                                              -21,000,000 -154,000,000 221,000,000 
          loss from disposal of assets
        		                                                              -1,000,000   
          gain from disposal of assets
        		                                                                -4,000,000 
          payments for repurchase of convertible senior notes
        		                                                                -102,000,000 
          payments for exercise of warrants
        		                                                                 
          impairment of short-term investments
        		                                                                 
          short-term investments
        		                                                                 
          proceeds from (payments for) exercise of warrants